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Finding the Fourth Proportional to 136.80, 187.56 and 131.04

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Solution

The fourth proportional to 136.80, 187.56 and 131.04 is: 179.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.80 : 187.56 = 131.04 : x
  2. Step 2: Convert to fraction form
    136.80/187.56 = 131.04/x
  3. Step 3: Cross multiply
    136.80x = 187.56 × 131.04
  4. Step 4: Simplify right side
    136.80x = 24,577.86
  5. Step 5: Solve for x
    x = 24,577.86/136.80
  6. Step 6: Final answer
    x = 179.66

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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.