UPDATE 1-Ansys Q3 profit beats Street view

* Q3 adj EPS 45 cents beat estimates by 4 cents

* Q3 adj revenue flat

* Sees Q4 adj rev of $136-$142 mln, adj EPS $0.47-$0.49

* Sees FY'10 adj rev up 5-10 pct

Nov 5 (Reuters) - Engineering simulation software maker Ansys Inc (ANSS.O) posted a quarterly profit that beat Wall Street expectations, helped by higher maintenance and services revenue and lower expenses, but forecast lower-than-expected fourth-quarter revenue.

"... we are still facing the realities of ongoing pressure on customer spending and prolonged sales cycles," the company said in a statement.

Ansys forecast fourth-quarter adjusted earnings of 47 cents to 49 cents a share on adjusted revenue of $136 million to $142 million.

Analysts were looking for earnings of 49 cents a share, excluding items, on revenue of $144.8 million, according to Thomson Reuters I/B/E/S.

Ansys makes software that helps firms analyze their product designs directly on the desktop.