* Q4 revenue up 28 pct to $191.9 mln
March 22 (Reuters) - Silver Wheaton reported on Thursday a 20 percent rise in profit, helped by increased selling prices of silver and gold.
Fourth-quarter earnings rose to $144.7 million, or 41 cents a share. That compared to adjusted earnings of $120.7 million, or 35 cents a share in the year-ago quarter.
Revenue rose 28 percent to $191.9 million, as the mining company sold 5.8 million ounces of silver.