Home / 81,553.29-122,255.15-31,620.57

Finding the Fourth Proportional to 81,553.29, 122,255.15 and 31,620.57

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Solution

The fourth proportional to 81,553.29, 122,255.15 and 31,620.57 is: 47,401.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,553.29 : 122,255.15 = 31,620.57 : x
  2. Step 2: Convert to fraction form
    81,553.29/122,255.15 = 31,620.57/x
  3. Step 3: Cross multiply
    81,553.29x = 122,255.15 × 31,620.57
  4. Step 4: Simplify right side
    81,553.29x = 3,865,777,370.33
  5. Step 5: Solve for x
    x = 3,865,777,370.33/81,553.29
  6. Step 6: Final answer
    x = 47,401.86

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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.