Rio Tinto (NYSE:RIO) reported quarterly earnings of $4.21 per share which met the analyst consensus estimate. This is a 42.23 percent increase over earnings of $2.96 per share from the same period last year. The company reported quarterly sales of $31.028 billion which missed the analyst consensus estimate of $32.030 billion by 3.13 percent. This is a 15.46 percent increase over sales of $26.873 billion the same period last year.