Finding the Fourth Proportional to 81,027.81, 121,578.17 and 51,437.70
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Solution
The fourth proportional to 81,027.81, 121,578.17 and 51,437.70 is: 77,179.69
Step by Step Solution
- Step 1: Write the proportion equation
81,027.81 : 121,578.17 = 51,437.70 : x - Step 2: Convert to fraction form
81,027.81/121,578.17 = 51,437.70/x - Step 3: Cross multiply
81,027.81x = 121,578.17 × 51,437.70 - Step 4: Simplify right side
81,027.81x = 6,253,701,177.82 - Step 5: Solve for x
x = 6,253,701,177.82/81,027.81 - Step 6: Final answer
x = 77,179.69
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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.