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Finding the Fourth Proportional to 155.13, 213.95 and 136.73

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Solution

The fourth proportional to 155.13, 213.95 and 136.73 is: 188.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.13 : 213.95 = 136.73 : x
  2. Step 2: Convert to fraction form
    155.13/213.95 = 136.73/x
  3. Step 3: Cross multiply
    155.13x = 213.95 × 136.73
  4. Step 4: Simplify right side
    155.13x = 29,251.63
  5. Step 5: Solve for x
    x = 29,251.63/155.13
  6. Step 6: Final answer
    x = 188.56

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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.