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Finding the Fourth Proportional to 81,750, 122,627.79 and 22,590.21

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Solution

The fourth proportional to 81,750, 122,627.79 and 22,590.21 is: 33,886.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,750 : 122,627.79 = 22,590.21 : x
  2. Step 2: Convert to fraction form
    81,750/122,627.79 = 22,590.21/x
  3. Step 3: Cross multiply
    81,750x = 122,627.79 × 22,590.21
  4. Step 4: Simplify right side
    81,750x = 2,770,187,527.94
  5. Step 5: Solve for x
    x = 2,770,187,527.94/81,750
  6. Step 6: Final answer
    x = 33,886.09

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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.