\(\frac{ T _{1}}{ T _{2}}=\frac{2 \pi \sqrt{\frac{ I _{1}}{ M _{1} B _{ H }}}}{2 \pi \sqrt{\frac{ I _{2}}{ M _{2} B _{ H }}}}=\frac{3}{4}\)
\(\sqrt{\frac{ I _{1}}{ I _{2}}} \times \frac{ M _{2}}{ M _{1}}=\frac{3}{4}\)
\(\sqrt{\frac{ I _{1}}{ I _{2}}} \times \sqrt{\frac{ M _{2}}{ M _{1}}}=\frac{3}{4}\)
\(\sqrt{\frac{3}{2}} \times \sqrt{\frac{ M _{2}}{ M _{1}}}=\frac{3}{4}\)
\(\frac{3}{2} \times \frac{ M _{2}}{ M _{1}}=\frac{9}{16}\)
\(\frac{ M _{1}}{ M _{2}}=\frac{8}{3}\)