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Finding the Fourth Proportional to 81,372.56, 122,058.87 and 39,244.79

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Solution

The fourth proportional to 81,372.56, 122,058.87 and 39,244.79 is: 58,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,372.56 : 122,058.87 = 39,244.79 : x
  2. Step 2: Convert to fraction form
    81,372.56/122,058.87 = 39,244.79/x
  3. Step 3: Cross multiply
    81,372.56x = 122,058.87 × 39,244.79
  4. Step 4: Simplify right side
    81,372.56x = 4,790,174,720.79
  5. Step 5: Solve for x
    x = 4,790,174,720.79/81,372.56
  6. Step 6: Final answer
    x = 58,867.20

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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.