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Finding the Fourth Proportional to 168.06, 231.80 and 99.06

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Solution

The fourth proportional to 168.06, 231.80 and 99.06 is: 136.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.06 : 231.80 = 99.06 : x
  2. Step 2: Convert to fraction form
    168.06/231.80 = 99.06/x
  3. Step 3: Cross multiply
    168.06x = 231.80 × 99.06
  4. Step 4: Simplify right side
    168.06x = 22,962.11
  5. Step 5: Solve for x
    x = 22,962.11/168.06
  6. Step 6: Final answer
    x = 136.63

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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.