That may be easy for you to say. You may be a boy living at home fully supported by his parents and the OP may be out in the real world where other things must take priority over buying an intel mac. You may be out on your own able to afford such luxuries and still the OP cannot. Your answer is inappropriate and unhelpful to be quiet frank. While it is somewhat honest and should be obvious to the OP, it's unnecessary coming from you.
That said, OP, unfortunately many are in your boat. Some who bought a PPC mac 4 years ago are finding it impossible to plunk down the funds to get what they need/want today to be able to go to the next level of OSs. However, the good news is that while Google Chrome may not support PPC, there are many other alternatives that work wonderfully still supporting the PPC platform. There is really no reason to support a dying platform, unfortunately. I have a PPC mac as well that is quickly becoming (if not already) a paperweight.