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Finding the Fourth Proportional to 57,630.72, 86,387.72 and 38,864.64

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Solution

The fourth proportional to 57,630.72, 86,387.72 and 38,864.64 is: 58,257.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,630.72 : 86,387.72 = 38,864.64 : x
  2. Step 2: Convert to fraction form
    57,630.72/86,387.72 = 38,864.64/x
  3. Step 3: Cross multiply
    57,630.72x = 86,387.72 × 38,864.64
  4. Step 4: Simplify right side
    57,630.72x = 3,357,427,638.22
  5. Step 5: Solve for x
    x = 3,357,427,638.22/57,630.72
  6. Step 6: Final answer
    x = 58,257.60

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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.