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Finding the Fourth Proportional to 279,644.67, 419,408.28 and 90,122.09

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Solution

The fourth proportional to 279,644.67, 419,408.28 and 90,122.09 is: 135,164.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,644.67 : 419,408.28 = 90,122.09 : x
  2. Step 2: Convert to fraction form
    279,644.67/419,408.28 = 90,122.09/x
  3. Step 3: Cross multiply
    279,644.67x = 419,408.28 × 90,122.09
  4. Step 4: Simplify right side
    279,644.67x = 37,797,948,659.86
  5. Step 5: Solve for x
    x = 37,797,948,659.86/279,644.67
  6. Step 6: Final answer
    x = 135,164.20

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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.