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Finding the Fourth Proportional to 143.21, 213.35 and 136.33

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Solution

The fourth proportional to 143.21, 213.35 and 136.33 is: 203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.21 : 213.35 = 136.33 : x
  2. Step 2: Convert to fraction form
    143.21/213.35 = 136.33/x
  3. Step 3: Cross multiply
    143.21x = 213.35 × 136.33
  4. Step 4: Simplify right side
    143.21x = 29,086.01
  5. Step 5: Solve for x
    x = 29,086.01/143.21
  6. Step 6: Final answer
    x = 203.10

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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.