Finding the Fourth Proportional to 129,112.79, 178,179.98 and 71,754.53
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Solution
The fourth proportional to 129,112.79, 178,179.98 and 71,754.53 is: 99,023.66
Step by Step Solution
- Step 1: Write the proportion equation
129,112.79 : 178,179.98 = 71,754.53 : x - Step 2: Convert to fraction form
129,112.79/178,179.98 = 71,754.53/x - Step 3: Cross multiply
129,112.79x = 178,179.98 × 71,754.53 - Step 4: Simplify right side
129,112.79x = 12,785,220,720.31 - Step 5: Solve for x
x = 12,785,220,720.31/129,112.79 - Step 6: Final answer
x = 99,023.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.