I'm a family of 3 earning slightly less than that (within 10k of it though) and I can say its not 100% easy street. I'm a single income household, so it's just me working. I work over an hour from home (I would not be able to earn that income closer to home), so I have to pay for 2 cars. I then have to insure them. I have the mortgage on my modest home (It was only $211,800, so it's not exactly a mansion or anything -- your basic 2 story 2 car garage in the suburbs type deal). Groceries, health care (and I'm lucky my health insurance is cheap with generous benefits -- I used to pay a lot more) , gasoline to work (it adds up due to distance -- I easily drive 80 miles round trip commuting in one of the worst traffic cities -- Atlanta), payments on the appliances, telecommunications (can't live in the modern age without cellphones and Internet), travel costs to see the in-laws on a regular basis, etc...
I know a lot of people have it a lot worse than me (my in-laws make $60k in Toronto and struggle a lot more than I do since the cost of living there is insane), but it's not like I'm flush with cash. I live pretty much paycheck to paycheck, it's just my expenses are higher due to various reasons.