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Finding the Fourth Proportional to 146.06, 218.66 and 128.06

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Solution

The fourth proportional to 146.06, 218.66 and 128.06 is: 191.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.06 : 218.66 = 128.06 : x
  2. Step 2: Convert to fraction form
    146.06/218.66 = 128.06/x
  3. Step 3: Cross multiply
    146.06x = 218.66 × 128.06
  4. Step 4: Simplify right side
    146.06x = 27,999.87
  5. Step 5: Solve for x
    x = 27,999.87/146.06
  6. Step 6: Final answer
    x = 191.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.