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Finding the Fourth Proportional to 136.55, 187.38 and 124.17

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Solution

The fourth proportional to 136.55, 187.38 and 124.17 is: 170.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.55 : 187.38 = 124.17 : x
  2. Step 2: Convert to fraction form
    136.55/187.38 = 124.17/x
  3. Step 3: Cross multiply
    136.55x = 187.38 × 124.17
  4. Step 4: Simplify right side
    136.55x = 23,266.90
  5. Step 5: Solve for x
    x = 23,266.90/136.55
  6. Step 6: Final answer
    x = 170.39

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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.