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Finding the Fourth Proportional to 67,909.92, 101,939.36 and 53,959.60

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Solution

The fourth proportional to 67,909.92, 101,939.36 and 53,959.60 is: 80,998.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,909.92 : 101,939.36 = 53,959.60 : x
  2. Step 2: Convert to fraction form
    67,909.92/101,939.36 = 53,959.60/x
  3. Step 3: Cross multiply
    67,909.92x = 101,939.36 × 53,959.60
  4. Step 4: Simplify right side
    67,909.92x = 5,500,607,089.86
  5. Step 5: Solve for x
    x = 5,500,607,089.86/67,909.92
  6. Step 6: Final answer
    x = 80,998.58

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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.