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Finding the Fourth Proportional to 136.79, 187.41 and 131.59

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Solution

The fourth proportional to 136.79, 187.41 and 131.59 is: 180.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.79 : 187.41 = 131.59 : x
  2. Step 2: Convert to fraction form
    136.79/187.41 = 131.59/x
  3. Step 3: Cross multiply
    136.79x = 187.41 × 131.59
  4. Step 4: Simplify right side
    136.79x = 24,661.37
  5. Step 5: Solve for x
    x = 24,661.37/136.79
  6. Step 6: Final answer
    x = 180.28

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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.