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Finding the Fourth Proportional to 168.40, 232.42 and 98.47

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Solution

The fourth proportional to 168.40, 232.42 and 98.47 is: 135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.40 : 232.42 = 98.47 : x
  2. Step 2: Convert to fraction form
    168.40/232.42 = 98.47/x
  3. Step 3: Cross multiply
    168.40x = 232.42 × 98.47
  4. Step 4: Simplify right side
    168.40x = 22,886.40
  5. Step 5: Solve for x
    x = 22,886.40/168.40
  6. Step 6: Final answer
    x = 135.90

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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.