The length of a wire becomes \( l_1 \) and \( l_2 \) when \( 100 \, \text{N} \) and \( 120 \, \text{N} \) tensions are applied respectively. If \( 10 l_2 = 11 l_1 \), the natural length of wire will be \( \dfrac{1}{x} l_1 \). Here the value of \( x \) is ________.
