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Finding the Fourth Proportional to 84,082.43, 126,120 and 20,901.22

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Solution

The fourth proportional to 84,082.43, 126,120 and 20,901.22 is: 31,350.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,082.43 : 126,120 = 20,901.22 : x
  2. Step 2: Convert to fraction form
    84,082.43/126,120 = 20,901.22/x
  3. Step 3: Cross multiply
    84,082.43x = 126,120 × 20,901.22
  4. Step 4: Simplify right side
    84,082.43x = 2,636,061,235.80
  5. Step 5: Solve for x
    x = 2,636,061,235.80/84,082.43
  6. Step 6: Final answer
    x = 31,350.92

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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.