Finding the Fourth Proportional to 129,891.20, 194,728.80 and 55,068.80
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Solution
The fourth proportional to 129,891.20, 194,728.80 and 55,068.80 is: 82,557.41
Step by Step Solution
- Step 1: Write the proportion equation
129,891.20 : 194,728.80 = 55,068.80 : x - Step 2: Convert to fraction form
129,891.20/194,728.80 = 55,068.80/x - Step 3: Cross multiply
129,891.20x = 194,728.80 × 55,068.80 - Step 4: Simplify right side
129,891.20x = 10,723,481,341.44 - Step 5: Solve for x
x = 10,723,481,341.44/129,891.20 - Step 6: Final answer
x = 82,557.41
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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.