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Finding the Fourth Proportional to 67,789.52, 101,663.74 and 20,392.02

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Solution

The fourth proportional to 67,789.52, 101,663.74 and 20,392.02 is: 30,581.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,789.52 : 101,663.74 = 20,392.02 : x
  2. Step 2: Convert to fraction form
    67,789.52/101,663.74 = 20,392.02/x
  3. Step 3: Cross multiply
    67,789.52x = 101,663.74 × 20,392.02
  4. Step 4: Simplify right side
    67,789.52x = 2,073,129,019.35
  5. Step 5: Solve for x
    x = 2,073,129,019.35/67,789.52
  6. Step 6: Final answer
    x = 30,581.85

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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.