$arrLocation1 = @{"123123123124234" = 1; "4563456345345" = 5; "3453245234234" = 4; "456456345345" = 4}
$arrLocation2 = @{"123123123124234" = 16; "4563456345345" = 1; "3453245234234" = 15; "456456345345" = 20}
$arrLocation3 = @{"123123123124234" = 20; "4563456345345" = 15; "3453245234234" = 1; "456456345345" = 15}
$arrLocation4 = @{"123123123124234" = 15; "4563456345345" = 20; "3453245234234" = 15; "456456345345" = 1}


$intLocation1Minimum = ($arrLocation1.Values | Measure-Object -Minimum).Minimum
$intLocation2Minimum = ($arrLocation2.Values | Measure-Object -Minimum).Minimum
$intLocation3Minimum = ($arrLocation3.Values | Measure-Object -Minimum).Minimum
$intLocation4Minimum = ($arrLocation4.Values | Measure-Object -Minimum).Minimum


$location1Beaconid = $arrLocation1.Keys | ? { $arrLocation1[$_] -eq $intLocation1Minimum }
$location2Beaconid = $arrLocation2.Keys | ? { $arrLocation2[$_] -eq $intLocation2Minimum }
$location3Beaconid = $arrLocation3.Keys | ? { $arrLocation3[$_] -eq $intLocation3Minimum }
$location4Beaconid = $arrLocation4.Keys | ? { $arrLocation4[$_] -eq $intLocation4Minimum }

$distance1_2 = ($arrLocation1[$location2Beaconid] + $arrLocation2[$location1Beaconid]) /2