WASHINGTON — The U.S. economy showed last month why it remains the envy of industrialized nations: In the face of tax increases and federal spending cuts, employers added a solid 165,000 jobs in April — and far more in February and March than anyone thought.

The job growth in April drove down the unemployment rate to a four-year low of 7.5 percent and sent a reassuring sign that the U.S. job market is improving.

In its report this morning, the Labor Department revised up its estimate of job gains in February and March by a combined 114,000. It now says employers added 332,000 jobs in February and 138,000 in March.

The economy has created an average of 208,000 jobs a month from November through April — above the 138,000 added in the previous six months.

“This is a good report,” said John Silvia, chief economist at Wells Fargo. “There’s a lot of strength... It’s good for the economy. It’s good for people’s income.”

The stronger job growth suggests that the federal budget cutting “does not mean recession,” Silvia said. “It does not mean a dramatic slowdown.”

Stock prices soared when trading began on Wall Street at 9:30 a.m. Eastern time. The Dow was up 155 points in early trading.

The unemployment rate has fallen 0.4 percentage point since the start of the year, though it remains high. The Federal Reserve has said it plans to keep short-term interest rates at record lows at least until unemployment falls to 6.5 percent.