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Finding the Fourth Proportional to 45,508.62, 67,906.89 and 40,780.49

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Solution

The fourth proportional to 45,508.62, 67,906.89 and 40,780.49 is: 60,851.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,508.62 : 67,906.89 = 40,780.49 : x
  2. Step 2: Convert to fraction form
    45,508.62/67,906.89 = 40,780.49/x
  3. Step 3: Cross multiply
    45,508.62x = 67,906.89 × 40,780.49
  4. Step 4: Simplify right side
    45,508.62x = 2,769,275,909.04
  5. Step 5: Solve for x
    x = 2,769,275,909.04/45,508.62
  6. Step 6: Final answer
    x = 60,851.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.