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Finding the Fourth Proportional to 168.70, 234.40 and 168.70

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Solution

The fourth proportional to 168.70, 234.40 and 168.70 is: 234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.70 : 234.40 = 168.70 : x
  2. Step 2: Convert to fraction form
    168.70/234.40 = 168.70/x
  3. Step 3: Cross multiply
    168.70x = 234.40 × 168.70
  4. Step 4: Simplify right side
    168.70x = 39,543.28
  5. Step 5: Solve for x
    x = 39,543.28/168.70
  6. Step 6: Final answer
    x = 234.40

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.