Finding the Fourth Proportional to 129,415.46, 194,131.56 and 40,672.68
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Solution
The fourth proportional to 129,415.46, 194,131.56 and 40,672.68 is: 61,011.65
Step by Step Solution
- Step 1: Write the proportion equation
129,415.46 : 194,131.56 = 40,672.68 : x - Step 2: Convert to fraction form
129,415.46/194,131.56 = 40,672.68/x - Step 3: Cross multiply
129,415.46x = 194,131.56 × 40,672.68 - Step 4: Simplify right side
129,415.46x = 7,895,850,817.78 - Step 5: Solve for x
x = 7,895,850,817.78/129,415.46 - Step 6: Final answer
x = 61,011.65
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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.