Finding the Fourth Proportional to 81,661.74, 122,251.95 and 79,649.70
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Solution
The fourth proportional to 81,661.74, 122,251.95 and 79,649.70 is: 119,239.82
Step by Step Solution
- Step 1: Write the proportion equation
81,661.74 : 122,251.95 = 79,649.70 : x - Step 2: Convert to fraction form
81,661.74/122,251.95 = 79,649.70/x - Step 3: Cross multiply
81,661.74x = 122,251.95 × 79,649.70 - Step 4: Simplify right side
81,661.74x = 9,737,331,141.92 - Step 5: Solve for x
x = 9,737,331,141.92/81,661.74 - Step 6: Final answer
x = 119,239.82
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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.