[tex] \frac{a}{b} = \frac{3}{4} [/tex]
[tex]a \times b = 108[/tex]
[tex] \frac{a}{b} = \frac{3}{4} = k[/tex]
[tex]a = 3k[/tex]
[tex]b = 4k[/tex]
[tex]a \times b = 3k \times 4k = 108[/tex]
[tex]12 {k}^{2} = 108[/tex]
[tex] {k}^{2} = 9[/tex]
[tex]k = 3[/tex]
[tex]a = 3 \times k = 3 \times 3 = 9[/tex]
[tex]b = 4 \times k = 4 \times 3 = 12[/tex]
