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Finding the Fourth Proportional to 68,291,488.80, 102,511,882.80 and 42,761,325.60

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Solution

The fourth proportional to 68,291,488.80, 102,511,882.80 and 42,761,325.60 is: 64,188,730.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,291,488.80 : 102,511,882.80 = 42,761,325.60 : x
  2. Step 2: Convert to fraction form
    68,291,488.80/102,511,882.80 = 42,761,325.60/x
  3. Step 3: Cross multiply
    68,291,488.80x = 102,511,882.80 × 42,761,325.60
  4. Step 4: Simplify right side
    68,291,488.80x = 4,383,543,998,279,839.50
  5. Step 5: Solve for x
    x = 4,383,543,998,279,839.50/68,291,488.80
  6. Step 6: Final answer
    x = 64,188,730.91

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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.