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Finding the Fourth Proportional to 138.86, 207.03 and 135.38

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Solution

The fourth proportional to 138.86, 207.03 and 135.38 is: 201.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.86 : 207.03 = 135.38 : x
  2. Step 2: Convert to fraction form
    138.86/207.03 = 135.38/x
  3. Step 3: Cross multiply
    138.86x = 207.03 × 135.38
  4. Step 4: Simplify right side
    138.86x = 28,027.72
  5. Step 5: Solve for x
    x = 28,027.72/138.86
  6. Step 6: Final answer
    x = 201.84

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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.