Finding the Fourth Proportional to 82,911.47, 124,367.20 and 20,581.97
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Solution
The fourth proportional to 82,911.47, 124,367.20 and 20,581.97 is: 30,872.95
Step by Step Solution
- Step 1: Write the proportion equation
82,911.47 : 124,367.20 = 20,581.97 : x - Step 2: Convert to fraction form
82,911.47/124,367.20 = 20,581.97/x - Step 3: Cross multiply
82,911.47x = 124,367.20 × 20,581.97 - Step 4: Simplify right side
82,911.47x = 2,559,721,306.09 - Step 5: Solve for x
x = 2,559,721,306.09/82,911.47 - Step 6: Final answer
x = 30,872.95
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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.