$Hash{44.52}{param1}{key1} = [101.01,'val1'];
$Hash{95.01}{param2}{key2} = [101.02,'val2'];

##</code><code>##

my $neededVal = 80.0;
if (defined $Hash{$neededVal}{param1}{key1}) {
print "DEFINED";
} else {
for (keys %Hash) {
print "$_\n"; #this prints 80.0 as a KEY (among the others)!!! How?..
}
}