The mean proportional of a and b is 10 and the value of a is 4times the value of b. The value of a+b (a>0 , b>0) is? The mean proportional of a and b is 10 and the value of a is 4 times the value of b. The value of a + b (a > 0, 6 > 0) is ? Share with your friends Share 0 Rahul Sil answered this Dear Student, Regards, 2 View Full Answer