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Finding the Fourth Proportional to 165.04, 248.69 and 136.78

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Solution

The fourth proportional to 165.04, 248.69 and 136.78 is: 206.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.04 : 248.69 = 136.78 : x
  2. Step 2: Convert to fraction form
    165.04/248.69 = 136.78/x
  3. Step 3: Cross multiply
    165.04x = 248.69 × 136.78
  4. Step 4: Simplify right side
    165.04x = 34,016.44
  5. Step 5: Solve for x
    x = 34,016.44/165.04
  6. Step 6: Final answer
    x = 206.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.