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Finding the Fourth Proportional to 99,339.60, 148,879.80 and 40,126.80

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Solution

The fourth proportional to 99,339.60, 148,879.80 and 40,126.80 is: 60,137.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,339.60 : 148,879.80 = 40,126.80 : x
  2. Step 2: Convert to fraction form
    99,339.60/148,879.80 = 40,126.80/x
  3. Step 3: Cross multiply
    99,339.60x = 148,879.80 × 40,126.80
  4. Step 4: Simplify right side
    99,339.60x = 5,974,069,958.64
  5. Step 5: Solve for x
    x = 5,974,069,958.64/99,339.60
  6. Step 6: Final answer
    x = 60,137.85

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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.