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Finding the Fourth Proportional to 40,697.20, 60,972.90 and 36,031.60

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Solution

The fourth proportional to 40,697.20, 60,972.90 and 36,031.60 is: 53,982.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,697.20 : 60,972.90 = 36,031.60 : x
  2. Step 2: Convert to fraction form
    40,697.20/60,972.90 = 36,031.60/x
  3. Step 3: Cross multiply
    40,697.20x = 60,972.90 × 36,031.60
  4. Step 4: Simplify right side
    40,697.20x = 2,196,951,143.64
  5. Step 5: Solve for x
    x = 2,196,951,143.64/40,697.20
  6. Step 6: Final answer
    x = 53,982.86

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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.