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Finding the Fourth Proportional to 81,374.31, 122,078.88 and 25,213.17

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Solution

The fourth proportional to 81,374.31, 122,078.88 and 25,213.17 is: 37,825.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,374.31 : 122,078.88 = 25,213.17 : x
  2. Step 2: Convert to fraction form
    81,374.31/122,078.88 = 25,213.17/x
  3. Step 3: Cross multiply
    81,374.31x = 122,078.88 × 25,213.17
  4. Step 4: Simplify right side
    81,374.31x = 3,077,995,554.85
  5. Step 5: Solve for x
    x = 3,077,995,554.85/81,374.31
  6. Step 6: Final answer
    x = 37,825.15

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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.