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Finding the Fourth Proportional to 221,571.82, 332,401.56 and 81,331.66

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Solution

The fourth proportional to 221,571.82, 332,401.56 and 81,331.66 is: 122,013.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,571.82 : 332,401.56 = 81,331.66 : x
  2. Step 2: Convert to fraction form
    221,571.82/332,401.56 = 81,331.66/x
  3. Step 3: Cross multiply
    221,571.82x = 332,401.56 × 81,331.66
  4. Step 4: Simplify right side
    221,571.82x = 27,034,770,661.39
  5. Step 5: Solve for x
    x = 27,034,770,661.39/221,571.82
  6. Step 6: Final answer
    x = 122,013.58

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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.