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Finding the Fourth Proportional to 84,469.68, 126,711.36 and 22,140

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Solution

The fourth proportional to 84,469.68, 126,711.36 and 22,140 is: 33,211.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,469.68 : 126,711.36 = 22,140 : x
  2. Step 2: Convert to fraction form
    84,469.68/126,711.36 = 22,140/x
  3. Step 3: Cross multiply
    84,469.68x = 126,711.36 × 22,140
  4. Step 4: Simplify right side
    84,469.68x = 2,805,389,510.40
  5. Step 5: Solve for x
    x = 2,805,389,510.40/84,469.68
  6. Step 6: Final answer
    x = 33,211.79

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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.