Dependency is not satisfiable: libdevmapper1.02.1(>=2:1.02.20)

I m trying to install virtualbox but ubuntu 14.04 generating an error "Dependency is not satisfiable: libdevmapper1.02.1(>=2:1.02.20)"
I applied this command but its not working;

soomaiya@soomaiya-Satellite:~$ sudo apt-get install libdevmapper1.02.1
Reading package lists... Done
Building dependency tree       
Reading state information... Done
libdevmapper1.02.1 is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 97 not upgraded.

please share the solution for this error.

You should double check the download from the Oracle site (http://www.oracle.com/technetwork/server-storage/virtualbox/downloads/index.html). I had the same issue, but realized I download the version for 15.10 instead of 15.04 (my current Ubuntu version). When I downloaded the correct version, it installed without any problems.