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Finding the Fourth Proportional to 232.73, 321.15 and 139.50

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Solution

The fourth proportional to 232.73, 321.15 and 139.50 is: 192.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.73 : 321.15 = 139.50 : x
  2. Step 2: Convert to fraction form
    232.73/321.15 = 139.50/x
  3. Step 3: Cross multiply
    232.73x = 321.15 × 139.50
  4. Step 4: Simplify right side
    232.73x = 44,800.43
  5. Step 5: Solve for x
    x = 44,800.43/232.73
  6. Step 6: Final answer
    x = 192.50

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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.