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Finding the Fourth Proportional to 83.08, 114.67 and 74.87

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Solution

The fourth proportional to 83.08, 114.67 and 74.87 is: 103.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.08 : 114.67 = 74.87 : x
  2. Step 2: Convert to fraction form
    83.08/114.67 = 74.87/x
  3. Step 3: Cross multiply
    83.08x = 114.67 × 74.87
  4. Step 4: Simplify right side
    83.08x = 8,585.52
  5. Step 5: Solve for x
    x = 8,585.52/83.08
  6. Step 6: Final answer
    x = 103.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.