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Finding the Fourth Proportional to 99,691,858.60, 149,691,752.70 and 54,342,226.60

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Solution

The fourth proportional to 99,691,858.60, 149,691,752.70 and 54,342,226.60 is: 81,597,266.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,691,858.60 : 149,691,752.70 = 54,342,226.60 : x
  2. Step 2: Convert to fraction form
    99,691,858.60/149,691,752.70 = 54,342,226.60/x
  3. Step 3: Cross multiply
    99,691,858.60x = 149,691,752.70 × 54,342,226.60
  4. Step 4: Simplify right side
    99,691,858.60x = 8,134,583,145,374,561
  5. Step 5: Solve for x
    x = 8,134,583,145,374,561/99,691,858.60
  6. Step 6: Final answer
    x = 81,597,266.41

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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.