A process to form an ethylene-based polymer, in the presence of at least one free-radical, said process comprises at least the following: polymerizing a mixture comprising ethylene, in a tubular reactor system comprising at least three ethylene-based feeds, and a reactor configuration comprising at least four reaction zones, and wherein the weight ratio of "the ethylene-based feed to the second reaction zone " to "the ethylene-based feed to the first reaction zone," EBF2/EBF1, is from 0.50 to 1.10; and wherein the weight ratio of "the ethylene-based feed to the third reaction zone " to "the ethylene-based feed to the first reaction zone," EBF3/EBF1, is from 0.40 to 2.50; and wherein in each reaction zone, the polymerization takes place at a start temperature greater, or equal to, 135°C; and wherein at least one of the following is met: (a) for three or more ethylene based feed streams, the peak polymerization temperatures in the first and the second reaction zones, are each, independently, from 200°C to 250°C; or (b) for four or more ethylene based feed streams, the peak polymerization temperatures in the first, the second and the third reaction zones, are each, independently, from 200°C to 250°C; and wherein the temperature differential between the peak temperatures of the first three reaction zones meets at least one the following relationships: i) TP1 > TP2, and 10°C ≤ Δ(TP1-TP2) ≤ 30°C; and/or ii) TP1 > TP3, and 10°C ≤ Δ(TP1-TP3) ≤ 30°C; and/or iii) TP1 ≥ TP2, and TP1> TP3, and 0°C ≤ Δ(TP1-TP2) ≤ 30°C, and 10°C ≤ Δ(TP1-TP3) < 30°C; and/or iv) TP1 > TP2, and TP1≥ TP3, and 10°C ≤ Δ(TP1-TP2) ≤ 30°C, and 0°C ≤ Δ(TP1-TP3) ≤ 30°C; and wherein TP1 is the peak temperature of the first reaction zone, TP2 is the peak temperature of the second reaction zone, and TP3 is the peak temperature of the third reaction zone, and wherein the ethylene based feed stream to the first reaction zone is from 20 wt% to 50 wt% of the total ethylene based feed stream(s) fed to the reactor system. polymerizing a mixture comprising ethylene, in a tubular reactor system comprising at least three ethylene-based feeds, and a reactor configuration comprising at least four reaction zones, and wherein the weight ratio of "the ethylene-based feed to the second reaction zone " to "the ethylene-based feed to the first reaction zone," EBF2/EBF1, is from 0.50 to 1.10; and wherein the weight ratio of "the ethylene-based feed to the third reaction zone " to "the ethylene-based feed to the first reaction zone," EBF3/EBF1, is from 0.40 to 2.50; and wherein in each reaction zone, the polymerization takes place at a start temperature greater, or equal to, 135°C; and wherein at least one of the following is met: (a) for three or more ethylene based feed streams, the peak polymerization temperatures in the first and the second reaction zones, are each, independently, from 200°C to 250°C; or (b) for four or more ethylene based feed streams, the peak polymerization temperatures in the first, the second and the third reaction zones, are each, independently, from 200°C to 250°C; (a) for three or more ethylene based feed streams, the peak polymerization temperatures in the first and the second reaction zones, are each, independently, from 200°C to 250°C; or (b) for four or more ethylene based feed streams, the peak polymerization temperatures in the first, the second and the third reaction zones, are each, independently, from 200°C to 250°C; and wherein the temperature differential between the peak temperatures of the first three reaction zones meets at least one the following relationships: i) TP1 > TP2, and 10°C ≤ Δ(TP1-TP2) ≤ 30°C; and/or ii) TP1 > TP3, and 10°C ≤ Δ(TP1-TP3) ≤ 30°C; and/or iii) TP1 ≥ TP2, and TP1> TP3, and 0°C ≤ Δ(TP1-TP2) ≤ 30°C, and 10°C ≤ Δ(TP1-TP3) < 30°C; and/or iv) TP1 > TP2, and TP1≥ TP3, and 10°C ≤ Δ(TP1-TP2) ≤ 30°C, and 0°C ≤ Δ(TP1-TP3) ≤ 30°C; and wherein TP1 is the peak temperature of the first reaction zone, TP2 is the peak temperature of the second reaction zone, and TP3 is the peak temperature of the third reaction zone, and wherein the ethylene based feed stream to the first reaction zone is from 20 wt% to 50 wt% of the total ethylene based feed stream(s) fed to the reactor system. i) TP1 > TP2, and 10°C ≤ Δ(TP1-TP2) ≤ 30°C; and/or ii) TP1 > TP3, and 10°C ≤ Δ(TP1-TP3) ≤ 30°C; and/or iii) TP1 ≥ TP2, and TP1> TP3, and 0°C ≤ Δ(TP1-TP2) ≤ 30°C, and 10°C ≤ Δ(TP1-TP3) < 30°C; and/or iv) TP1 > TP2, and TP1≥ TP3, and 10°C ≤ Δ(TP1-TP2) ≤ 30°C, and 0°C ≤ Δ(TP1-TP3) ≤ 30°C; and wherein TP1 is the peak temperature of the first reaction zone, TP2 is the peak temperature of the second reaction zone, and TP3 is the peak temperature of the third reaction zone, and wherein the ethylene based feed stream to the first reaction zone is from 20 wt% to 50 wt% of the total ethylene based feed stream(s) fed to the reactor system.