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Finding the Fourth Proportional to 118.53, 176.79 and 103.19

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Solution

The fourth proportional to 118.53, 176.79 and 103.19 is: 153.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.53 : 176.79 = 103.19 : x
  2. Step 2: Convert to fraction form
    118.53/176.79 = 103.19/x
  3. Step 3: Cross multiply
    118.53x = 176.79 × 103.19
  4. Step 4: Simplify right side
    118.53x = 18,242.44
  5. Step 5: Solve for x
    x = 18,242.44/118.53
  6. Step 6: Final answer
    x = 153.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.