The integration of mathematical modeling with technology and the advantages of technology to modeling process have become more important in today's fast-growing society. The studies about how the technology affects the mathematical modeling process and how to use the technology more effectively are of importance. The purpose of this study is to illustrate how to use GeoGebra in the process of mathematical modeling. In this study, GeoGebra was used in solution process of a problem designed in accordance with mathematical modeling and the intended uses of GeoGebra were described in the mathematical modeling process. The solution of the Height-Foot Length Problem designed by the researchers was carried out taking into account the seven step modeling process. With this study, it was exemplified how the mathematics teachers will be able to use the mathematical modeling and the GeoGebra in their lessons. It is thought that GeoGebra will contribute to the uncovering and the development of modeling skills and will be provided more conceptual and mathematical thinking by preventing losing in procedures.