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Finding the Fourth Proportional to 63,978.20, 95,967.30 and 56,979.80

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Solution

The fourth proportional to 63,978.20, 95,967.30 and 56,979.80 is: 85,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,978.20 : 95,967.30 = 56,979.80 : x
  2. Step 2: Convert to fraction form
    63,978.20/95,967.30 = 56,979.80/x
  3. Step 3: Cross multiply
    63,978.20x = 95,967.30 × 56,979.80
  4. Step 4: Simplify right side
    63,978.20x = 5,468,197,560.54
  5. Step 5: Solve for x
    x = 5,468,197,560.54/63,978.20
  6. Step 6: Final answer
    x = 85,469.70

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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.