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Finding the Fourth Proportional to 57,701.20, 86,638.20 and 40,248.40

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Solution

The fourth proportional to 57,701.20, 86,638.20 and 40,248.40 is: 60,432.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,701.20 : 86,638.20 = 40,248.40 : x
  2. Step 2: Convert to fraction form
    57,701.20/86,638.20 = 40,248.40/x
  3. Step 3: Cross multiply
    57,701.20x = 86,638.20 × 40,248.40
  4. Step 4: Simplify right side
    57,701.20x = 3,487,048,928.88
  5. Step 5: Solve for x
    x = 3,487,048,928.88/57,701.20
  6. Step 6: Final answer
    x = 60,432.87

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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.