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Finding the Fourth Proportional to 138.60, 207.60 and 119.62

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Solution

The fourth proportional to 138.60, 207.60 and 119.62 is: 179.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.60 : 207.60 = 119.62 : x
  2. Step 2: Convert to fraction form
    138.60/207.60 = 119.62/x
  3. Step 3: Cross multiply
    138.60x = 207.60 × 119.62
  4. Step 4: Simplify right side
    138.60x = 24,833.11
  5. Step 5: Solve for x
    x = 24,833.11/138.60
  6. Step 6: Final answer
    x = 179.17

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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.