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Finding the Fourth Proportional to 83.21, 124.81 and 22.34

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Solution

The fourth proportional to 83.21, 124.81 and 22.34 is: 33.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.21 : 124.81 = 22.34 : x
  2. Step 2: Convert to fraction form
    83.21/124.81 = 22.34/x
  3. Step 3: Cross multiply
    83.21x = 124.81 × 22.34
  4. Step 4: Simplify right side
    83.21x = 2,788.14
  5. Step 5: Solve for x
    x = 2,788.14/83.21
  6. Step 6: Final answer
    x = 33.51

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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.