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Finding the Fourth Proportional to 63,428.92, 87,489.71 and 40,796.55

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Solution

The fourth proportional to 63,428.92, 87,489.71 and 40,796.55 is: 56,272.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,428.92 : 87,489.71 = 40,796.55 : x
  2. Step 2: Convert to fraction form
    63,428.92/87,489.71 = 40,796.55/x
  3. Step 3: Cross multiply
    63,428.92x = 87,489.71 × 40,796.55
  4. Step 4: Simplify right side
    63,428.92x = 3,569,278,328.50
  5. Step 5: Solve for x
    x = 3,569,278,328.50/63,428.92
  6. Step 6: Final answer
    x = 56,272.10

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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.