Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_231623_3 (sex_ratio INTEGER, population VARCHAR)
### Question:
Name the sex ratio lowest for population 4773138
### Answer:
SELECT MAX(sex_ratio) FROM table_231623_3 WHERE population = 4773138