Home / 81,721.54-122,585.28-22,561.66

Finding the Fourth Proportional to 81,721.54, 122,585.28 and 22,561.66

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Solution

The fourth proportional to 81,721.54, 122,585.28 and 22,561.66 is: 33,843.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,721.54 : 122,585.28 = 22,561.66 : x
  2. Step 2: Convert to fraction form
    81,721.54/122,585.28 = 22,561.66/x
  3. Step 3: Cross multiply
    81,721.54x = 122,585.28 × 22,561.66
  4. Step 4: Simplify right side
    81,721.54x = 2,765,727,408.36
  5. Step 5: Solve for x
    x = 2,765,727,408.36/81,721.54
  6. Step 6: Final answer
    x = 33,843.31

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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.