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Finding the Fourth Proportional to 136.38, 188.25 and 117.99

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Solution

The fourth proportional to 136.38, 188.25 and 117.99 is: 162.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.38 : 188.25 = 117.99 : x
  2. Step 2: Convert to fraction form
    136.38/188.25 = 117.99/x
  3. Step 3: Cross multiply
    136.38x = 188.25 × 117.99
  4. Step 4: Simplify right side
    136.38x = 22,211.62
  5. Step 5: Solve for x
    x = 22,211.62/136.38
  6. Step 6: Final answer
    x = 162.87

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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.