To find out how many citizens chose "Dog" as their favorite pet, you can use the percentage of citizens who chose dogs and apply it to the total number of citizens who answered the question.
The percentage of citizens who chose dogs is 23%.
To calculate the number of citizens who chose dogs:
\[ \text{Number of citizens who chose dogs} = \text{Total citizens} \times \left( \frac{\text{Percentage of dog lovers}}{100} \right) \]
Substituting in the values:
\[ \text{Number of citizens who chose dogs} = 75,000 \times \left( \frac{23}{100} \right) \]
\[ = 75,000 \times 0.23 \]
\[ = 17,250 \]
Therefore, 17,250 citizens chose dogs as their favorite pet.