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Finding the Fourth Proportional to 138.88, 207.14 and 130.96

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Solution

The fourth proportional to 138.88, 207.14 and 130.96 is: 195.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.88 : 207.14 = 130.96 : x
  2. Step 2: Convert to fraction form
    138.88/207.14 = 130.96/x
  3. Step 3: Cross multiply
    138.88x = 207.14 × 130.96
  4. Step 4: Simplify right side
    138.88x = 27,127.05
  5. Step 5: Solve for x
    x = 27,127.05/138.88
  6. Step 6: Final answer
    x = 195.33

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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.