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Finding the Fourth Proportional to 83.27, 124.03 and 78.94

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Solution

The fourth proportional to 83.27, 124.03 and 78.94 is: 117.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.27 : 124.03 = 78.94 : x
  2. Step 2: Convert to fraction form
    83.27/124.03 = 78.94/x
  3. Step 3: Cross multiply
    83.27x = 124.03 × 78.94
  4. Step 4: Simplify right side
    83.27x = 9,790.62
  5. Step 5: Solve for x
    x = 9,790.62/83.27
  6. Step 6: Final answer
    x = 117.57

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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.