[tex]\begin{gathered} For\text{ United States} \\ d=\frac{309,000,000}{3,717,811}=83.11 \\ For\text{ Japan} \\ d=83.11 \\ 83.11=\frac{People}{145,883} \\ Solving\text{ People} \\ People=(83.11)(145,883) \\ People=12,124,336 \\ The\text{ number of people in Japan is 12,124,336} \end{gathered}[/tex]