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Finding the Fourth Proportional to 63,686.16, 87,861.24 and 38,491.92

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Solution

The fourth proportional to 63,686.16, 87,861.24 and 38,491.92 is: 53,103.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,686.16 : 87,861.24 = 38,491.92 : x
  2. Step 2: Convert to fraction form
    63,686.16/87,861.24 = 38,491.92/x
  3. Step 3: Cross multiply
    63,686.16x = 87,861.24 × 38,491.92
  4. Step 4: Simplify right side
    63,686.16x = 3,381,947,821.18
  5. Step 5: Solve for x
    x = 3,381,947,821.18/63,686.16
  6. Step 6: Final answer
    x = 53,103.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.