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Finding the Fourth Proportional to 107.88, 161.90 and 82.24

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Solution

The fourth proportional to 107.88, 161.90 and 82.24 is: 123.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.88 : 161.90 = 82.24 : x
  2. Step 2: Convert to fraction form
    107.88/161.90 = 82.24/x
  3. Step 3: Cross multiply
    107.88x = 161.90 × 82.24
  4. Step 4: Simplify right side
    107.88x = 13,314.66
  5. Step 5: Solve for x
    x = 13,314.66/107.88
  6. Step 6: Final answer
    x = 123.42

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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.