Finding the Fourth Proportional to 129,812.10, 194,718.15 and 80,207.70
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Solution
The fourth proportional to 129,812.10, 194,718.15 and 80,207.70 is: 120,311.55
Step by Step Solution
- Step 1: Write the proportion equation
129,812.10 : 194,718.15 = 80,207.70 : x - Step 2: Convert to fraction form
129,812.10/194,718.15 = 80,207.70/x - Step 3: Cross multiply
129,812.10x = 194,718.15 × 80,207.70 - Step 4: Simplify right side
129,812.10x = 15,617,894,959.76 - Step 5: Solve for x
x = 15,617,894,959.76/129,812.10 - Step 6: Final answer
x = 120,311.55
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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.