Home / 81,912.21-122,868.38-22,747.89

Finding the Fourth Proportional to 81,912.21, 122,868.38 and 22,747.89

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Solution

The fourth proportional to 81,912.21, 122,868.38 and 22,747.89 is: 34,121.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,912.21 : 122,868.38 = 22,747.89 : x
  2. Step 2: Convert to fraction form
    81,912.21/122,868.38 = 22,747.89/x
  3. Step 3: Cross multiply
    81,912.21x = 122,868.38 × 22,747.89
  4. Step 4: Simplify right side
    81,912.21x = 2,794,996,278.98
  5. Step 5: Solve for x
    x = 2,794,996,278.98/81,912.21
  6. Step 6: Final answer
    x = 34,121.85

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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.