Your 72Gb of space, which you have now formatted, is in an extended partition. Extended partitions are nice, as you are not limited to 4 primary partitions anymore. However, from your setup, and what you are trying to acheive, it doesn't look like you need bother with extended partitions. So, here is what I would do.
Unmount your swap space.
swapoff -a
Alternatively, right click the swap space in gparted and select swapoff.
In Gparted, delete your new 72Gb partition.
In Gparted, delete your swap partition.
In gparted, delete your extended parition.
Deleting the partitions is done by right clicking the partition, and selecting delete.
In Gparted, select your main primary partition, and resize it. Make sure to leave enough free space at the end for a swap partition.
In Gparted, create a second primary partition at the end.
In Gparted, format your second primary partition as swap.
In Gparted, apply the changes and exit.
Probably a good idea to reboot.