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Finding the Fourth Proportional to 71,263.38, 106,862.35 and 20,650.90

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Solution

The fourth proportional to 71,263.38, 106,862.35 and 20,650.90 is: 30,966.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,263.38 : 106,862.35 = 20,650.90 : x
  2. Step 2: Convert to fraction form
    71,263.38/106,862.35 = 20,650.90/x
  3. Step 3: Cross multiply
    71,263.38x = 106,862.35 × 20,650.90
  4. Step 4: Simplify right side
    71,263.38x = 2,206,803,703.62
  5. Step 5: Solve for x
    x = 2,206,803,703.62/71,263.38
  6. Step 6: Final answer
    x = 30,966.87

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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.