The theoretical probability of rolling a specific outcome on a fair six-sided die is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.
In this case, there is 1 favorable outcome for rolling a 3, and there are 6 possible outcomes (1, 2, 3, 4, 5, 6).
The formula for theoretical probability is:
\[ P(\text{rolling a 3}) = \frac{\text{Number of favorable outcomes}}{\text{Total number of possible outcomes}} = \frac{1}{6} \approx 0.167 \]
Therefore, the theoretical probability of rolling a 3 on your next roll is 0.167.