Let makoha contribute x then njao contributes x * 3/2 = 1.5x
and odhiambo contributes 1.5x * 2.5 = 3.75 x
so we have the equation x + 1.5x + 3.75x = 120000
6.25x = 120000
x = sh 19,200 which is the amount for makhoa
Answer : amount contributed by odhiambo = 19,200 * 3.75 = sh 72,000