I need illustrator help ASAP.

Problem: I drew something slightly too big for the scale I need it. I need to scale it down to fit within a 3 inch by 4 inch box...but when I scale down the image the line thickness gets too thick and it becomes really muddy.

Question: How do I scale down an image and let it keep the proportions I have it in the big version?

I need this help asap so if any of you know, it would be MOST appreciated.

Current Mood: determined
Current Music: If We Hold On Together - Diana Ross (Land Before Time Soundtrack)