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Finding the Fourth Proportional to 213.80, 295.14 and 136.28

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Solution

The fourth proportional to 213.80, 295.14 and 136.28 is: 188.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.80 : 295.14 = 136.28 : x
  2. Step 2: Convert to fraction form
    213.80/295.14 = 136.28/x
  3. Step 3: Cross multiply
    213.80x = 295.14 × 136.28
  4. Step 4: Simplify right side
    213.80x = 40,221.68
  5. Step 5: Solve for x
    x = 40,221.68/213.80
  6. Step 6: Final answer
    x = 188.13

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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.