lot: the object cast to let a decision fall outside human control, and the share or destiny that falls to a person by it
A goral was a small object, probably a pebble or marked stone, that people drew or shook out to settle a question no one could decide on their own. Casting the lot handed the choice to God: the outcome was random to human eyes but understood as His verdict, so it could divide land, assign duties, pick a person, or set a date without anyone being able to argue the result was rigged.
From the object itself the word stretches naturally to what the object produces. Because the lot decided who got which field, goral came to mean the very portion a person received, especially the stretch of land a tribe or family inherited. The thing cast and the thing won by casting it are named by the same word.
In its furthest reach the word leaves the physical lot behind and names the share life itself deals a person: their appointed place, their future, their fate. Here it is no longer a stone in a hand but the whole portion God has measured out, whether a secure inheritance or a coming ruin.
These are not separate words but one idea followed to its end: the lot, the verdict it gives, the portion that verdict assigns, and finally the destiny that portion amounts to.