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Finding the Fourth Proportional to 81,622.88, 122,265.84 and 75,717.44

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Solution

The fourth proportional to 81,622.88, 122,265.84 and 75,717.44 is: 113,419.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,622.88 : 122,265.84 = 75,717.44 : x
  2. Step 2: Convert to fraction form
    81,622.88/122,265.84 = 75,717.44/x
  3. Step 3: Cross multiply
    81,622.88x = 122,265.84 × 75,717.44
  4. Step 4: Simplify right side
    81,622.88x = 9,257,656,404.25
  5. Step 5: Solve for x
    x = 9,257,656,404.25/81,622.88
  6. Step 6: Final answer
    x = 113,419.87

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1.5x scale

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.