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Finding the Fourth Proportional to 135.90, 196.65 and 135.90

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Solution

The fourth proportional to 135.90, 196.65 and 135.90 is: 196.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.90 : 196.65 = 135.90 : x
  2. Step 2: Convert to fraction form
    135.90/196.65 = 135.90/x
  3. Step 3: Cross multiply
    135.90x = 196.65 × 135.90
  4. Step 4: Simplify right side
    135.90x = 26,724.74
  5. Step 5: Solve for x
    x = 26,724.74/135.90
  6. Step 6: Final answer
    x = 196.65

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.