Total Investment = 144000
After 20% profit, The investment becomes ( 1.2 * 144000 ) = 172800
Profit = 172800-144000 =28800
Since the investment is in the ratio 4:5 , the profit will also be in the same ratio.
4x+5x = 9x = 28800
x= 28800 / 9 = 3200
Suresh's Share = 4*3200 = 12800
Ramesh's Share = 5*3200 = 16000