What is the expected height of a child at 4 years old if they have doubled their height at 2 years?

A child’s growth pattern provides important insights into their expected height at various ages. Typically, the height of a child at the age of 2 years is approximately half of their expected height as an adult. By the time a child reaches 4 years old, they generally continue to grow, usually averaging about 5 cm or more in height per year during early childhood.

If a child's height is doubled at age 2, we can infer that their height at 2 years serves as a significant predictor for their future growth. For instance, if we assume the height at 2 years is 50 cm, the expected height at the age of 4 would likely be around 100 cm after accounting for the average annual growth within that timeframe. This aligns with common growth patterns observed in pediatric growth charts.

Therefore, the height of 100 cm at 4 years old is a reasonable expectation if the child's height has indeed doubled by the age of 2. This growth trajectory is consistent with pediatric standards and growth expectations for children within that age range.