Three masses \( m_{1} = 4 \, \text{kg} \), \( m_{2} = 4 \, \text{kg} \) and \( m_{3} = 6 \, \text{kg} \) are suspended from a fixed smooth frictionless pully as shown in the figure below. The value of \( \dfrac{T_{1}}{T_{2}} \) is _______.

\( \text{(take } g = 10 \, \text{m/s}^{2} ) \)