Finding the Fourth Proportional to 129,425.40, 194,138.10 and 76,807.80
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Solution
The fourth proportional to 129,425.40, 194,138.10 and 76,807.80 is: 115,211.70
Step by Step Solution
- Step 1: Write the proportion equation
129,425.40 : 194,138.10 = 76,807.80 : x - Step 2: Convert to fraction form
129,425.40/194,138.10 = 76,807.80/x - Step 3: Cross multiply
129,425.40x = 194,138.10 × 76,807.80 - Step 4: Simplify right side
129,425.40x = 14,911,320,357.18 - Step 5: Solve for x
x = 14,911,320,357.18/129,425.40 - Step 6: Final answer
x = 115,211.70
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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.