1. **State the problem:** Add the numbers 72000, 25200, 9000, and 15000.
2. **Write the addition expression:**
$$72000 + 25200 + 9000 + 15000$$
3. **Add step-by-step:**
- First, add 72000 and 25200:
$$72000 + 25200 = 97200$$
- Next, add 9000:
$$97200 + 9000 = 106200$$
- Finally, add 15000:
$$106200 + 15000 = 121200$$
4. **Final answer:**
$$\boxed{121200}$$
Add Numbers 19D4Be
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