C₃H₈ is a homologous member of the series of

The homologous series of alkanes include C₃H₈. Alkanes have the general formula as C_nH_2n+2. As the chemical formula C₃H₈ which follows the general formula ${\mathrm{C}}_3{\mathrm{H}}_{2\times 3+2}$ which shows that it is an alkane.