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Finding the Fourth Proportional to 71,989.64, 107,984.46 and 36,906.92

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Solution

The fourth proportional to 71,989.64, 107,984.46 and 36,906.92 is: 55,360.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,989.64 : 107,984.46 = 36,906.92 : x
  2. Step 2: Convert to fraction form
    71,989.64/107,984.46 = 36,906.92/x
  3. Step 3: Cross multiply
    71,989.64x = 107,984.46 × 36,906.92
  4. Step 4: Simplify right side
    71,989.64x = 3,985,373,286.54
  5. Step 5: Solve for x
    x = 3,985,373,286.54/71,989.64
  6. Step 6: Final answer
    x = 55,360.38

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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.