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Finding the Fourth Proportional to 146.62, 218.69 and 138.16

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Solution

The fourth proportional to 146.62, 218.69 and 138.16 is: 206.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.62 : 218.69 = 138.16 : x
  2. Step 2: Convert to fraction form
    146.62/218.69 = 138.16/x
  3. Step 3: Cross multiply
    146.62x = 218.69 × 138.16
  4. Step 4: Simplify right side
    146.62x = 30,214.21
  5. Step 5: Solve for x
    x = 30,214.21/146.62
  6. Step 6: Final answer
    x = 206.07

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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.