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Finding the Fourth Proportional to 140.85, 210.11 and 135.09

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Solution

The fourth proportional to 140.85, 210.11 and 135.09 is: 201.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.85 : 210.11 = 135.09 : x
  2. Step 2: Convert to fraction form
    140.85/210.11 = 135.09/x
  3. Step 3: Cross multiply
    140.85x = 210.11 × 135.09
  4. Step 4: Simplify right side
    140.85x = 28,383.08
  5. Step 5: Solve for x
    x = 28,383.08/140.85
  6. Step 6: Final answer
    x = 201.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.