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Finding the Fourth Proportional to 118.58, 163.49 and 102.17

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Solution

The fourth proportional to 118.58, 163.49 and 102.17 is: 140.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.58 : 163.49 = 102.17 : x
  2. Step 2: Convert to fraction form
    118.58/163.49 = 102.17/x
  3. Step 3: Cross multiply
    118.58x = 163.49 × 102.17
  4. Step 4: Simplify right side
    118.58x = 16,703.77
  5. Step 5: Solve for x
    x = 16,703.77/118.58
  6. Step 6: Final answer
    x = 140.87

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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.