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Finding the Fourth Proportional to 99,691,900.80, 149,285,908.80 and 79,536,508.80

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Solution

The fourth proportional to 99,691,900.80, 149,285,908.80 and 79,536,508.80 is: 119,103,757.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,691,900.80 : 149,285,908.80 = 79,536,508.80 : x
  2. Step 2: Convert to fraction form
    99,691,900.80/149,285,908.80 = 79,536,508.80/x
  3. Step 3: Cross multiply
    99,691,900.80x = 149,285,908.80 × 79,536,508.80
  4. Step 4: Simplify right side
    99,691,900.80x = 11,873,679,998,987,198
  5. Step 5: Solve for x
    x = 11,873,679,998,987,198/99,691,900.80
  6. Step 6: Final answer
    x = 119,103,757.71

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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.