Finding the Fourth Proportional to 208,546.10, 312,819.15 and 129,619.70
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Solution
The fourth proportional to 208,546.10, 312,819.15 and 129,619.70 is: 194,429.55
Step by Step Solution
- Step 1: Write the proportion equation
208,546.10 : 312,819.15 = 129,619.70 : x - Step 2: Convert to fraction form
208,546.10/312,819.15 = 129,619.70/x - Step 3: Cross multiply
208,546.10x = 312,819.15 × 129,619.70 - Step 4: Simplify right side
208,546.10x = 40,547,524,377.26 - Step 5: Solve for x
x = 40,547,524,377.26/208,546.10 - Step 6: Final answer
x = 194,429.55
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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.