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Finding the Fourth Proportional to 154.68, 230.97 and 139.17

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Solution

The fourth proportional to 154.68, 230.97 and 139.17 is: 207.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.68 : 230.97 = 139.17 : x
  2. Step 2: Convert to fraction form
    154.68/230.97 = 139.17/x
  3. Step 3: Cross multiply
    154.68x = 230.97 × 139.17
  4. Step 4: Simplify right side
    154.68x = 32,144.09
  5. Step 5: Solve for x
    x = 32,144.09/154.68
  6. Step 6: Final answer
    x = 207.81

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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.