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Finding the Fourth Proportional to 66,561,906.60, 99,795,620.70 and 25,605,520.20

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Solution

The fourth proportional to 66,561,906.60, 99,795,620.70 and 25,605,520.20 is: 38,390,107.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,561,906.60 : 99,795,620.70 = 25,605,520.20 : x
  2. Step 2: Convert to fraction form
    66,561,906.60/99,795,620.70 = 25,605,520.20/x
  3. Step 3: Cross multiply
    66,561,906.60x = 99,795,620.70 × 25,605,520.20
  4. Step 4: Simplify right side
    66,561,906.60x = 2,555,318,781,705,388
  5. Step 5: Solve for x
    x = 2,555,318,781,705,388/66,561,906.60
  6. Step 6: Final answer
    x = 38,390,107.98

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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.