////Given
Rh=1.09678*10**7                             //m-1
Rhe=1.09722*10**7                            //m-1

//Calculation
Mr=(Rhe-Rh)/(Rh-(Rhe/4.0))                  //ratio of electron mass

//Result
printf("\n Ratio of the electron mas to the proton mass  %0.2f *10**-4",Mr*10**4)