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Finding the Fourth Proportional to 99,649,105.80, 149,473,658.70 and 73,821,073.20

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Solution

The fourth proportional to 99,649,105.80, 149,473,658.70 and 73,821,073.20 is: 110,731,609.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,649,105.80 : 149,473,658.70 = 73,821,073.20 : x
  2. Step 2: Convert to fraction form
    99,649,105.80/149,473,658.70 = 73,821,073.20/x
  3. Step 3: Cross multiply
    99,649,105.80x = 149,473,658.70 × 73,821,073.20
  4. Step 4: Simplify right side
    99,649,105.80x = 11,034,305,900,364,516
  5. Step 5: Solve for x
    x = 11,034,305,900,364,516/99,649,105.80
  6. Step 6: Final answer
    x = 110,731,609.80

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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.