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Finding the Fourth Proportional to 232.90, 321.32 and 139.61

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Solution

The fourth proportional to 232.90, 321.32 and 139.61 is: 192.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.90 : 321.32 = 139.61 : x
  2. Step 2: Convert to fraction form
    232.90/321.32 = 139.61/x
  3. Step 3: Cross multiply
    232.90x = 321.32 × 139.61
  4. Step 4: Simplify right side
    232.90x = 44,860.64
  5. Step 5: Solve for x
    x = 44,860.64/232.90
  6. Step 6: Final answer
    x = 192.62

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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.