Finding the Fourth Proportional to 129,331.60, 194,143.20 and 76,770.70
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Solution
The fourth proportional to 129,331.60, 194,143.20 and 76,770.70 is: 115,242.60
Step by Step Solution
- Step 1: Write the proportion equation
129,331.60 : 194,143.20 = 76,770.70 : x - Step 2: Convert to fraction form
129,331.60/194,143.20 = 76,770.70/x - Step 3: Cross multiply
129,331.60x = 194,143.20 × 76,770.70 - Step 4: Simplify right side
129,331.60x = 14,904,509,364.24 - Step 5: Solve for x
x = 14,904,509,364.24/129,331.60 - Step 6: Final answer
x = 115,242.60
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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.