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Finding the Fourth Proportional to 83.27, 124.40 and 69.59

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Solution

The fourth proportional to 83.27, 124.40 and 69.59 is: 103.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.27 : 124.40 = 69.59 : x
  2. Step 2: Convert to fraction form
    83.27/124.40 = 69.59/x
  3. Step 3: Cross multiply
    83.27x = 124.40 × 69.59
  4. Step 4: Simplify right side
    83.27x = 8,656.03
  5. Step 5: Solve for x
    x = 8,656.03/83.27
  6. Step 6: Final answer
    x = 103.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.