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Finding the Fourth Proportional to 169.64, 234.15 and 104.20

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Solution

The fourth proportional to 169.64, 234.15 and 104.20 is: 143.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.64 : 234.15 = 104.20 : x
  2. Step 2: Convert to fraction form
    169.64/234.15 = 104.20/x
  3. Step 3: Cross multiply
    169.64x = 234.15 × 104.20
  4. Step 4: Simplify right side
    169.64x = 24,398.43
  5. Step 5: Solve for x
    x = 24,398.43/169.64
  6. Step 6: Final answer
    x = 143.82

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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.