Home / 81,391.44-122,105.76-31,471.92

Finding the Fourth Proportional to 81,391.44, 122,105.76 and 31,471.92

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Solution

The fourth proportional to 81,391.44, 122,105.76 and 31,471.92 is: 47,215.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.44 : 122,105.76 = 31,471.92 : x
  2. Step 2: Convert to fraction form
    81,391.44/122,105.76 = 31,471.92/x
  3. Step 3: Cross multiply
    81,391.44x = 122,105.76 × 31,471.92
  4. Step 4: Simplify right side
    81,391.44x = 3,842,902,710.26
  5. Step 5: Solve for x
    x = 3,842,902,710.26/81,391.44
  6. Step 6: Final answer
    x = 47,215.07

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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.