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Finding the Fourth Proportional to 83.21, 124.87 and 34.46

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Solution

The fourth proportional to 83.21, 124.87 and 34.46 is: 51.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.21 : 124.87 = 34.46 : x
  2. Step 2: Convert to fraction form
    83.21/124.87 = 34.46/x
  3. Step 3: Cross multiply
    83.21x = 124.87 × 34.46
  4. Step 4: Simplify right side
    83.21x = 4,303.02
  5. Step 5: Solve for x
    x = 4,303.02/83.21
  6. Step 6: Final answer
    x = 51.72

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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.