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Finding the Fourth Proportional to 220,693, 331,040.34 and 54,481

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Solution

The fourth proportional to 220,693, 331,040.34 and 54,481 is: 81,721.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,693 : 331,040.34 = 54,481 : x
  2. Step 2: Convert to fraction form
    220,693/331,040.34 = 54,481/x
  3. Step 3: Cross multiply
    220,693x = 331,040.34 × 54,481
  4. Step 4: Simplify right side
    220,693x = 18,035,408,763.54
  5. Step 5: Solve for x
    x = 18,035,408,763.54/220,693
  6. Step 6: Final answer
    x = 81,721.71

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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.