The mean proportional between 234 and 104 is
Pick one.
A) 12 B) 39 C) 54 D) 156 E) none

Rationale: "sol . required mean proportional = √ 234 x 104 = √ 13 x 9 x 2 x 13 x 8 = ( 13 x 3 x 4 ) = 156 . answer d"
Answer: D