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Finding the Fourth Proportional to 63,845.72, 88,064.88 and 39,930.87

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Solution

The fourth proportional to 63,845.72, 88,064.88 and 39,930.87 is: 55,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,845.72 : 88,064.88 = 39,930.87 : x
  2. Step 2: Convert to fraction form
    63,845.72/88,064.88 = 39,930.87/x
  3. Step 3: Cross multiply
    63,845.72x = 88,064.88 × 39,930.87
  4. Step 4: Simplify right side
    63,845.72x = 3,516,507,567.65
  5. Step 5: Solve for x
    x = 3,516,507,567.65/63,845.72
  6. Step 6: Final answer
    x = 55,078.20

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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.