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Finding the Fourth Proportional to 163.00, 243.97 and 138.39

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Solution

The fourth proportional to 163.00, 243.97 and 138.39 is: 207.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.00 : 243.97 = 138.39 : x
  2. Step 2: Convert to fraction form
    163.00/243.97 = 138.39/x
  3. Step 3: Cross multiply
    163.00x = 243.97 × 138.39
  4. Step 4: Simplify right side
    163.00x = 33,764.61
  5. Step 5: Solve for x
    x = 33,764.61/163.00
  6. Step 6: Final answer
    x = 207.15

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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.