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Finding the Fourth Proportional to 136.64, 205.41 and 126.62

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Solution

The fourth proportional to 136.64, 205.41 and 126.62 is: 190.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.64 : 205.41 = 126.62 : x
  2. Step 2: Convert to fraction form
    136.64/205.41 = 126.62/x
  3. Step 3: Cross multiply
    136.64x = 205.41 × 126.62
  4. Step 4: Simplify right side
    136.64x = 26,009.01
  5. Step 5: Solve for x
    x = 26,009.01/136.64
  6. Step 6: Final answer
    x = 190.35

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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.