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Finding the Fourth Proportional to 99,660.60, 149,481.18 and 40,499.80

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Solution

The fourth proportional to 99,660.60, 149,481.18 and 40,499.80 is: 60,745.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,660.60 : 149,481.18 = 40,499.80 : x
  2. Step 2: Convert to fraction form
    99,660.60/149,481.18 = 40,499.80/x
  3. Step 3: Cross multiply
    99,660.60x = 149,481.18 × 40,499.80
  4. Step 4: Simplify right side
    99,660.60x = 6,053,957,893.76
  5. Step 5: Solve for x
    x = 6,053,957,893.76/99,660.60
  6. Step 6: Final answer
    x = 60,745.75

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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.