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Finding the Fourth Proportional to 298,491,801.20, 447,737,701.80 and 91,229,811.20

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Solution

The fourth proportional to 298,491,801.20, 447,737,701.80 and 91,229,811.20 is: 136,844,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,491,801.20 : 447,737,701.80 = 91,229,811.20 : x
  2. Step 2: Convert to fraction form
    298,491,801.20/447,737,701.80 = 91,229,811.20/x
  3. Step 3: Cross multiply
    298,491,801.20x = 447,737,701.80 × 91,229,811.20
  4. Step 4: Simplify right side
    298,491,801.20x = 40,847,026,002,335,904
  5. Step 5: Solve for x
    x = 40,847,026,002,335,904/298,491,801.20
  6. Step 6: Final answer
    x = 136,844,716.80

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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.