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Finding the Fourth Proportional to 71.52, 99.17 and 68.69

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Solution

The fourth proportional to 71.52, 99.17 and 68.69 is: 95.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.52 : 99.17 = 68.69 : x
  2. Step 2: Convert to fraction form
    71.52/99.17 = 68.69/x
  3. Step 3: Cross multiply
    71.52x = 99.17 × 68.69
  4. Step 4: Simplify right side
    71.52x = 6,811.15
  5. Step 5: Solve for x
    x = 6,811.15/71.52
  6. Step 6: Final answer
    x = 95.23

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.