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Finding the Fourth Proportional to 136.58, 187.05 and 134.78

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Solution

The fourth proportional to 136.58, 187.05 and 134.78 is: 184.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.58 : 187.05 = 134.78 : x
  2. Step 2: Convert to fraction form
    136.58/187.05 = 134.78/x
  3. Step 3: Cross multiply
    136.58x = 187.05 × 134.78
  4. Step 4: Simplify right side
    136.58x = 25,209.93
  5. Step 5: Solve for x
    x = 25,209.93/136.58
  6. Step 6: Final answer
    x = 184.58

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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.