Finding the Fourth Proportional to 129,626.70, 194,148.45 and 77,138.70
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Solution
The fourth proportional to 129,626.70, 194,148.45 and 77,138.70 is: 115,534.52
Step by Step Solution
- Step 1: Write the proportion equation
129,626.70 : 194,148.45 = 77,138.70 : x - Step 2: Convert to fraction form
129,626.70/194,148.45 = 77,138.70/x - Step 3: Cross multiply
129,626.70x = 194,148.45 × 77,138.70 - Step 4: Simplify right side
129,626.70x = 14,976,359,040.02 - Step 5: Solve for x
x = 14,976,359,040.02/129,626.70 - Step 6: Final answer
x = 115,534.52
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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.