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Finding the Fourth Proportional to 143.12, 213.55 and 134.41

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Solution

The fourth proportional to 143.12, 213.55 and 134.41 is: 200.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.12 : 213.55 = 134.41 : x
  2. Step 2: Convert to fraction form
    143.12/213.55 = 134.41/x
  3. Step 3: Cross multiply
    143.12x = 213.55 × 134.41
  4. Step 4: Simplify right side
    143.12x = 28,703.26
  5. Step 5: Solve for x
    x = 28,703.26/143.12
  6. Step 6: Final answer
    x = 200.56

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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.