Seth = <<17.5=17.5>>17.5 pounds
Jerome = 3 * 17.5 = <<3*17.5=52.5>>52.5 pounds
Veronica = 17.5 + 1.5 = <<17.5+1.5=19>>19 pounds
Total = 17.5 + 52.5 + 19 = <<17.5+52.5+19=89>>89 pounds
The 3 people lost a total of 89 pounds.
#### 89