Profits rose in the last quarter for the most popular search engine in China. Baidu on Friday said quarterly profit rose 77%, compared with the year-ago quarter. Profit for the three months ending Dec. 31 came in at 2 billion yuan, or $326.3 million. Revenue rose 82.5 percent to 4.5 billion yuan, or $710.9 million. The number of active online marketers rose 12.7% to 311,000 in the past year.