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Finding the Fourth Proportional to 136.21, 188.01 and 92.62

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Solution

The fourth proportional to 136.21, 188.01 and 92.62 is: 127.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.21 : 188.01 = 92.62 : x
  2. Step 2: Convert to fraction form
    136.21/188.01 = 92.62/x
  3. Step 3: Cross multiply
    136.21x = 188.01 × 92.62
  4. Step 4: Simplify right side
    136.21x = 17,413.49
  5. Step 5: Solve for x
    x = 17,413.49/136.21
  6. Step 6: Final answer
    x = 127.84

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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.