Question

In proportion the first third and fourth terms are 51,81 ,108 respectively find the second term

Answer 1

Answer:

a:b:c:d

51 : b : 81 : 108

product of means = product of extremes

b * 81. = 51 * 108

b = 51 * 12 / 9

b = 17 * 4

b = 68