Create relationship in semantic Model data PBI

Dear Team,

I have semantic model loaded in Power BI where there is no relationship between 3 tables.

all three table are independent unable to merge it since its semantic model.

table 1                          table 2                     table 3

Product                        region                      value

apple                            US                             100

orange                          China                          59

banana                          Denmark                    40

result need in table 2 as Column  = If table 1 contain 'apple' and table 2 contain 'US' then "US Apple" else table 1

Thanks!