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Finding the Fourth Proportional to 84,192.62, 126,288.63 and 21,863.12

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Solution

The fourth proportional to 84,192.62, 126,288.63 and 21,863.12 is: 32,794.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,192.62 : 126,288.63 = 21,863.12 : x
  2. Step 2: Convert to fraction form
    84,192.62/126,288.63 = 21,863.12/x
  3. Step 3: Cross multiply
    84,192.62x = 126,288.63 × 21,863.12
  4. Step 4: Simplify right side
    84,192.62x = 2,761,063,788.05
  5. Step 5: Solve for x
    x = 2,761,063,788.05/84,192.62
  6. Step 6: Final answer
    x = 32,794.60

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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.