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Finding the Fourth Proportional to 138.22, 207.58 and 134.98

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Solution

The fourth proportional to 138.22, 207.58 and 134.98 is: 202.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.22 : 207.58 = 134.98 : x
  2. Step 2: Convert to fraction form
    138.22/207.58 = 134.98/x
  3. Step 3: Cross multiply
    138.22x = 207.58 × 134.98
  4. Step 4: Simplify right side
    138.22x = 28,019.15
  5. Step 5: Solve for x
    x = 28,019.15/138.22
  6. Step 6: Final answer
    x = 202.71

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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.