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Finding the Fourth Proportional to 118.02, 162.57 and 108.81

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Solution

The fourth proportional to 118.02, 162.57 and 108.81 is: 149.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.02 : 162.57 = 108.81 : x
  2. Step 2: Convert to fraction form
    118.02/162.57 = 108.81/x
  3. Step 3: Cross multiply
    118.02x = 162.57 × 108.81
  4. Step 4: Simplify right side
    118.02x = 17,689.65
  5. Step 5: Solve for x
    x = 17,689.65/118.02
  6. Step 6: Final answer
    x = 149.88

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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.