Ravi and David divide the amount Rs.72,000 in the ratio  , then the share of Ravi is 

: Total amount  $=\mathrm{Rs}.72000$
Ratio of amount shared between Ravi and David  $=5:4$
Total parts in the ratio $=5+4=9$
Share of Ravi  $=72000\times \frac{5}{9}=\mathrm{Rs}.40,000$