Lenovo Group Ltd, the world's No.2 PC brand, posted a better-than-expected 88 percent rise in second-quarter profit, helped by acquisitions and an increase in sales in emerging markets such as China.

Net profit at the Chinese PC maker totaled $143.92 million for the quarter ended September 30, up from $76.59 million a year earlier.

The result beat an average profit forecast of $118.3 million from eight analysts polled by Thomson Reuters I/B/E/S.

Lenovo, which overtook Dell Inc in the third quarter to claim the No.2 spot and trails Hewlett-Packard Co, had reported that its net profit nearly double in the first quarter and more than triple in the fourth quarter of the previous fiscal year.

(Reporting by Lee Chyen Yee; Editing by Miyoung Kim and Chris Lewis)