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Finding the Fourth Proportional to 138.92, 208.48 and 93.38

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Solution

The fourth proportional to 138.92, 208.48 and 93.38 is: 140.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.92 : 208.48 = 93.38 : x
  2. Step 2: Convert to fraction form
    138.92/208.48 = 93.38/x
  3. Step 3: Cross multiply
    138.92x = 208.48 × 93.38
  4. Step 4: Simplify right side
    138.92x = 19,467.86
  5. Step 5: Solve for x
    x = 19,467.86/138.92
  6. Step 6: Final answer
    x = 140.14

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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.