Finding the Fourth Proportional to 128,014.52, 176,691.66 and 77,755.64
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Solution
The fourth proportional to 128,014.52, 176,691.66 and 77,755.64 is: 107,321.99
Step by Step Solution
- Step 1: Write the proportion equation
128,014.52 : 176,691.66 = 77,755.64 : x - Step 2: Convert to fraction form
128,014.52/176,691.66 = 77,755.64/x - Step 3: Cross multiply
128,014.52x = 176,691.66 × 77,755.64 - Step 4: Simplify right side
128,014.52x = 13,738,773,105.96 - Step 5: Solve for x
x = 13,738,773,105.96/128,014.52 - Step 6: Final answer
x = 107,321.99
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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.