A long-lasting and successful marriage compatibility between Libra and Sagittarius isn't surprising here when the two understand each other's interests, trigger points, ups and downs, and pro in maintaining both their personal and social time. As long as they learn, adapt, and stay together, this pairing makes happiness seem like a piece of cake. To maintain their inner fire, adventurous Sagittarians require mental support and harmony, whereas intense Libras require someone to cheer them up.