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Finding the Fourth Proportional to 150.39, 207.33 and 121.23

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Solution

The fourth proportional to 150.39, 207.33 and 121.23 is: 167.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.39 : 207.33 = 121.23 : x
  2. Step 2: Convert to fraction form
    150.39/207.33 = 121.23/x
  3. Step 3: Cross multiply
    150.39x = 207.33 × 121.23
  4. Step 4: Simplify right side
    150.39x = 25,134.62
  5. Step 5: Solve for x
    x = 25,134.62/150.39
  6. Step 6: Final answer
    x = 167.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.