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Finding the Fourth Proportional to 146.06, 217.92 and 139.18

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Solution

The fourth proportional to 146.06, 217.92 and 139.18 is: 207.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.06 : 217.92 = 139.18 : x
  2. Step 2: Convert to fraction form
    146.06/217.92 = 139.18/x
  3. Step 3: Cross multiply
    146.06x = 217.92 × 139.18
  4. Step 4: Simplify right side
    146.06x = 30,330.11
  5. Step 5: Solve for x
    x = 30,330.11/146.06
  6. Step 6: Final answer
    x = 207.66

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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.