Home / 81,558.31-122,348.87-25,402.49

Finding the Fourth Proportional to 81,558.31, 122,348.87 and 25,402.49

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Solution

The fourth proportional to 81,558.31, 122,348.87 and 25,402.49 is: 38,107.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,558.31 : 122,348.87 = 25,402.49 : x
  2. Step 2: Convert to fraction form
    81,558.31/122,348.87 = 25,402.49/x
  3. Step 3: Cross multiply
    81,558.31x = 122,348.87 × 25,402.49
  4. Step 4: Simplify right side
    81,558.31x = 3,107,965,819.67
  5. Step 5: Solve for x
    x = 3,107,965,819.67/81,558.31
  6. Step 6: Final answer
    x = 38,107.29

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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.