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Finding the Fourth Proportional to 136.88, 187.20 and 136.32

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Solution

The fourth proportional to 136.88, 187.20 and 136.32 is: 186.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.88 : 187.20 = 136.32 : x
  2. Step 2: Convert to fraction form
    136.88/187.20 = 136.32/x
  3. Step 3: Cross multiply
    136.88x = 187.20 × 136.32
  4. Step 4: Simplify right side
    136.88x = 25,519.10
  5. Step 5: Solve for x
    x = 25,519.10/136.88
  6. Step 6: Final answer
    x = 186.43

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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.