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Finding the Fourth Proportional to 118.38, 162.49 and 113.37

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Solution

The fourth proportional to 118.38, 162.49 and 113.37 is: 155.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.38 : 162.49 = 113.37 : x
  2. Step 2: Convert to fraction form
    118.38/162.49 = 113.37/x
  3. Step 3: Cross multiply
    118.38x = 162.49 × 113.37
  4. Step 4: Simplify right side
    118.38x = 18,421.21
  5. Step 5: Solve for x
    x = 18,421.21/118.38
  6. Step 6: Final answer
    x = 155.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.