The Wiener-Hopf technique has been been applied to solve the Ornstein-Zernike equation for hard sphere fluids and to calculate thereby a thermodynamically consistent equation of state. An analytic form of a thermodynamically consistent equation of state for hard sphere fluids is obtained in which the correlation range is treated as an adjustable parameter. With a suitable choice of the range parameter the equation of state presented is found to be numerically comparable to the Carnahan-Starling equation of state in accuracy. (C) 2003 American Institute of Physics.