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Finding the Fourth Proportional to 136.22, 188.01 and 111.71

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Solution

The fourth proportional to 136.22, 188.01 and 111.71 is: 154.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.22 : 188.01 = 111.71 : x
  2. Step 2: Convert to fraction form
    136.22/188.01 = 111.71/x
  3. Step 3: Cross multiply
    136.22x = 188.01 × 111.71
  4. Step 4: Simplify right side
    136.22x = 21,002.60
  5. Step 5: Solve for x
    x = 21,002.60/136.22
  6. Step 6: Final answer
    x = 154.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.