In this paper, we establish a unique common
random fixed p oint t heorem i n c one r andom m etric spaces
for four weakly compatible mappings by using an implicit
relation. Some corollaries of this theorem for two and three
random weakly compatible mappings are obtained. Some
examples are given to support our generalization. Our
results presented in this paper extend and improve several
recent results in the setting of cone random metric spaces.