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Finding the Fourth Proportional to 83,778.60, 125,667.90 and 74,593.20

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Solution

The fourth proportional to 83,778.60, 125,667.90 and 74,593.20 is: 111,889.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,778.60 : 125,667.90 = 74,593.20 : x
  2. Step 2: Convert to fraction form
    83,778.60/125,667.90 = 74,593.20/x
  3. Step 3: Cross multiply
    83,778.60x = 125,667.90 × 74,593.20
  4. Step 4: Simplify right side
    83,778.60x = 9,373,970,798.28
  5. Step 5: Solve for x
    x = 9,373,970,798.28/83,778.60
  6. Step 6: Final answer
    x = 111,889.80

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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.