PROFIT = $ 84,000
Total capitals of A for 36 MONTHS = $ 1,00,000 36 = $ 3600000
After 1 YEAR , Total capitals of B for 24 months = $ 1,00,000 24 = $ 4800000
Ratio of equivalent capitals of A and B for 1 month = 3600000 : 4800000
Ratio of equivalent capitals of A and B for 1 month = 36 : 48 = 3 : 4