Motorola Third-Quarter Earnings Rise  CHICAGO (Reuters) - Motorola Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MOT.N target=/stocks/quickinfo/fullquote"&gt;MOT.N&lt;/A&gt;, the world's No.  2 maker of cell phones, on Tuesday said its quarterly profit  rose sharply, helped by improving sales of a host of new  handset models.