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Finding the Fourth Proportional to 71,780.28, 107,845.62 and 67,801.56

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Solution

The fourth proportional to 71,780.28, 107,845.62 and 67,801.56 is: 101,867.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,780.28 : 107,845.62 = 67,801.56 : x
  2. Step 2: Convert to fraction form
    71,780.28/107,845.62 = 67,801.56/x
  3. Step 3: Cross multiply
    71,780.28x = 107,845.62 × 67,801.56
  4. Step 4: Simplify right side
    71,780.28x = 7,312,101,275.17
  5. Step 5: Solve for x
    x = 7,312,101,275.17/71,780.28
  6. Step 6: Final answer
    x = 101,867.83

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1.5x scale

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.