2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198488We construct a supersymmetric model based on the semi-simple gauge group $SU(3)_c \times SU(3)_L \times SU(3)_R$ with the relation $tanβ\simeq m_t/m_b$ automatically arising from its structure. The model below a scale $\sim 10^{16}$ GeV gives naturally rise just to the minimal supersymmetric standard model and therefore to the presently favored values for $sin^2 θ_w$ and $α_s$ without fields in representations higher than the fundamental.9 pages, LaTeX, UT-STPD-3-94High Energy Physics - Phenomenologytext