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Finding the Fourth Proportional to 66,451,972.20, 99,677,958.30 and 43,758,493.80

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Solution

The fourth proportional to 66,451,972.20, 99,677,958.30 and 43,758,493.80 is: 65,637,740.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,451,972.20 : 99,677,958.30 = 43,758,493.80 : x
  2. Step 2: Convert to fraction form
    66,451,972.20/99,677,958.30 = 43,758,493.80/x
  3. Step 3: Cross multiply
    66,451,972.20x = 99,677,958.30 × 43,758,493.80
  4. Step 4: Simplify right side
    66,451,972.20x = 4,361,757,320,267,208
  5. Step 5: Solve for x
    x = 4,361,757,320,267,208/66,451,972.20
  6. Step 6: Final answer
    x = 65,637,740.70

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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.