The grandson of newspaper magnate William Randolph Hearst has scored a significant victory in his fight with his wife over his share of his grandfather’s fortune.

After a Manhattan judge awarded John Randolph Hearst Jr.’s estranged wife, Barbara W. Hearst, temporary monthly support of $25,939 and denied Mr. Hearst’s divorce petition for lack of grounds, Ms. Hearst sought a permanent increase to $90,000 in order to maintain her lifestyle.