Found Petra in FamilySearch, and SHE is listed correctly as born at Elsborg:
Petra Johanne PEDERSEN
birth: 30 July 1877
Elsborg, Viborg, Denmark
death: 13 August 1969
New York City, New York, New York
It shows her married 3 times: (1) August Ingman (2) Busch (3) Konrad Petersen
All 3 are listed just as born 1873, with no months, days, or places, and no death dates or clear indication of their marriage order to Petra.
So, more specific and valid info is needed from USA records, to identify Konrad's origin.