INVESTMENT of P = K
Then, investment of N of = (K + 5000)
and investment of M = (K + 5000) + 4000 = (K + 9000)
According to the question.
K + (K + 5000) + (K + 9000) = 50000
3K + 14000 = 50000
3K = 50000 - 14000 = 36000
K = 36000/3 = 12000
Clearly, investment of P = 12000
Investment of N = (K + 5000) = 12000 + 5000 = 17000
Investment of M = (K + 9000) = 12000 + 9000 = 21000
M's share : N's share : P's share = 21000 : 17000 : 12000
= 21 : 17 : 12
Hence, M's share = [21/(21 + 17 + 12 )] X 70000
= (21/50) x 70000 = 29400