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Finding the Fourth Proportional to 137.60, 207.34 and 115.28

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Solution

The fourth proportional to 137.60, 207.34 and 115.28 is: 173.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.60 : 207.34 = 115.28 : x
  2. Step 2: Convert to fraction form
    137.60/207.34 = 115.28/x
  3. Step 3: Cross multiply
    137.60x = 207.34 × 115.28
  4. Step 4: Simplify right side
    137.60x = 23,902.16
  5. Step 5: Solve for x
    x = 23,902.16/137.60
  6. Step 6: Final answer
    x = 173.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.