Finding the Fourth Proportional to 121,976.80, 182,965.20 and 102,731.20
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Solution
The fourth proportional to 121,976.80, 182,965.20 and 102,731.20 is: 154,096.80
Step by Step Solution
- Step 1: Write the proportion equation
121,976.80 : 182,965.20 = 102,731.20 : x - Step 2: Convert to fraction form
121,976.80/182,965.20 = 102,731.20/x - Step 3: Cross multiply
121,976.80x = 182,965.20 × 102,731.20 - Step 4: Simplify right side
121,976.80x = 18,796,234,554.24 - Step 5: Solve for x
x = 18,796,234,554.24/121,976.80 - Step 6: Final answer
x = 154,096.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.