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Finding the Fourth Proportional to 87,691,189.95, 122,969,219.85 and 87,691,189.95

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Solution

The fourth proportional to 87,691,189.95, 122,969,219.85 and 87,691,189.95 is: 122,969,219.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,691,189.95 : 122,969,219.85 = 87,691,189.95 : x
  2. Step 2: Convert to fraction form
    87,691,189.95/122,969,219.85 = 87,691,189.95/x
  3. Step 3: Cross multiply
    87,691,189.95x = 122,969,219.85 × 87,691,189.95
  4. Step 4: Simplify right side
    87,691,189.95x = 10,783,317,215,869,660
  5. Step 5: Solve for x
    x = 10,783,317,215,869,660/87,691,189.95
  6. Step 6: Final answer
    x = 122,969,219.85

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.