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Finding the Fourth Proportional to 136.62, 187.72 and 130.59

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Solution

The fourth proportional to 136.62, 187.72 and 130.59 is: 179.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.62 : 187.72 = 130.59 : x
  2. Step 2: Convert to fraction form
    136.62/187.72 = 130.59/x
  3. Step 3: Cross multiply
    136.62x = 187.72 × 130.59
  4. Step 4: Simplify right side
    136.62x = 24,514.35
  5. Step 5: Solve for x
    x = 24,514.35/136.62
  6. Step 6: Final answer
    x = 179.43

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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.