根据题目有:(4/5)a=b÷(3/4)=c÷(0.2)=(10/9)d
即:(4/5)a=(4/3)b=c÷(2/10)=(10/9)d
:(4/5)a=(4/3)b=c÷(1/5)=(10/9)d
:(4/5)a=(4/3)b=5c=(10/9)d
:(4/5)a*45=(4/3)b*45=5c*45=(10/9)d*45
:36a=60b=225c=50d
所以c
根据题目有:(4/5)a=b÷(3/4)=c÷(0.2)=(10/9)d
即:(4/5)a=(4/3)b=c÷(2/10)=(10/9)d
:(4/5)a=(4/3)b=c÷(1/5)=(10/9)d
:(4/5)a=(4/3)b=5c=(10/9)d
:(4/5)a*45=(4/3)b*45=5c*45=(10/9)d*45
:36a=60b=225c=50d
所以c