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Finding the Fourth Proportional to 136.90, 187.66 and 135.96

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Solution

The fourth proportional to 136.90, 187.66 and 135.96 is: 186.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.90 : 187.66 = 135.96 : x
  2. Step 2: Convert to fraction form
    136.90/187.66 = 135.96/x
  3. Step 3: Cross multiply
    136.90x = 187.66 × 135.96
  4. Step 4: Simplify right side
    136.90x = 25,514.25
  5. Step 5: Solve for x
    x = 25,514.25/136.90
  6. Step 6: Final answer
    x = 186.37

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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.