
Her apartment's on the FOURTH floor,
elevator is broken, you're gonna...
The Big Bang Theory Season 1, Episode 2

That's the FOURTH time
she's been to the bathroom
The Big Bang Theory Season 12, Episode 23

second, third, FOURTH.
The Big Bang Theory Season 12, Episode 5

Oh, dude, the FOURTH Harry Pottermovie
was just fine.
The Big Bang Theory Season 3, Episode 2

so lobby, second, third, FOURTH.
The Big Bang Theory Season 12, Episode 5