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Finding the Fourth Proportional to 81,481.72, 122,217.12 and 22,317.88

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Solution

The fourth proportional to 81,481.72, 122,217.12 and 22,317.88 is: 33,475.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,481.72 : 122,217.12 = 22,317.88 : x
  2. Step 2: Convert to fraction form
    81,481.72/122,217.12 = 22,317.88/x
  3. Step 3: Cross multiply
    81,481.72x = 122,217.12 × 22,317.88
  4. Step 4: Simplify right side
    81,481.72x = 2,727,627,018.11
  5. Step 5: Solve for x
    x = 2,727,627,018.11/81,481.72
  6. Step 6: Final answer
    x = 33,475.32

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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.