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Finding the Fourth Proportional to 138,793.60, 208,190.40 and 89,027.20

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Solution

The fourth proportional to 138,793.60, 208,190.40 and 89,027.20 is: 133,540.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,793.60 : 208,190.40 = 89,027.20 : x
  2. Step 2: Convert to fraction form
    138,793.60/208,190.40 = 89,027.20/x
  3. Step 3: Cross multiply
    138,793.60x = 208,190.40 × 89,027.20
  4. Step 4: Simplify right side
    138,793.60x = 18,534,608,378.88
  5. Step 5: Solve for x
    x = 18,534,608,378.88/138,793.60
  6. Step 6: Final answer
    x = 133,540.80

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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.