Densities, viscosities, refractive indexes, and surface tensions of a ternary system (tetrahydofuran + 2-propanol + 2,2,4-trimethylpentane) at T = 298.15 K and three constituent binary systems at T = (288.15, 298.15, and 308.15) K were measured at atmospheric pressure. Densities were determined using a vibrating-tube densimeter. Viscosities were measured with an automatic microviscometer based on the rolling ball principle. Refractive indexes were measured using a digital Abbe-type refractometer. Surface tensions were determined by the Wilhelmy-plate method. These results were used to calculate excess molar volumes V(E), deviations in the viscosity Delta eta, deviations in the refractive index Delta n(D), and deviations in the surface tension Delta sigma. The calculated quantities of V(E), Delta eta, Delta n(D), and Delta sigma were fitted to variable-degree polynomials. The ternary results were compared with the values estimated by different empirical equations of prediction.