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Finding the Fourth Proportional to 136.99, 205.59 and 102.82

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Solution

The fourth proportional to 136.99, 205.59 and 102.82 is: 154.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.99 : 205.59 = 102.82 : x
  2. Step 2: Convert to fraction form
    136.99/205.59 = 102.82/x
  3. Step 3: Cross multiply
    136.99x = 205.59 × 102.82
  4. Step 4: Simplify right side
    136.99x = 21,138.44
  5. Step 5: Solve for x
    x = 21,138.44/136.99
  6. Step 6: Final answer
    x = 154.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.