Macapagal was the son of President Diosdado Macapagal and Purita dela Rosa.
Purita was Diosdado Macapagal’s first wife. Arturo was the second child and eldest son among the Macapagal family.
Cielo was his elder sister. His mother passed away when he was just one year old and his father married Evangeline Macaraeg Macapagal when he was five years old.
His father had two children with Evangeline, Gloria Macapagal-Arroyo and Diosdado Macapagal Jr.
Macapagal represented the Phillipines in shooting on several competitions including at the 1972 and 1976 Summer Olympics where he participated at the free pistol event.
During his 1972 Olympic stint he established a national record for free pistol, a record which would not be broken for 21 years, the longest in the country’s shooting history.
He was chosen as the “Most Outstanding Shooter of the Decade” by the Philippine Olympic Committee in 1980.
In 1973 and 1974, he was named the All-around Filipino Sports Awardee by the Philippine Sportswriters Association.