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Finding the Fourth Proportional to 63,640.62, 87,867.99 and 39,778.02

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Solution

The fourth proportional to 63,640.62, 87,867.99 and 39,778.02 is: 54,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,640.62 : 87,867.99 = 39,778.02 : x
  2. Step 2: Convert to fraction form
    63,640.62/87,867.99 = 39,778.02/x
  3. Step 3: Cross multiply
    63,640.62x = 87,867.99 × 39,778.02
  4. Step 4: Simplify right side
    63,640.62x = 3,495,214,663.58
  5. Step 5: Solve for x
    x = 3,495,214,663.58/63,640.62
  6. Step 6: Final answer
    x = 54,921.13

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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.