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Finding the Fourth Proportional to 112.90, 169.46 and 67.30

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Solution

The fourth proportional to 112.90, 169.46 and 67.30 is: 101.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.90 : 169.46 = 67.30 : x
  2. Step 2: Convert to fraction form
    112.90/169.46 = 67.30/x
  3. Step 3: Cross multiply
    112.90x = 169.46 × 67.30
  4. Step 4: Simplify right side
    112.90x = 11,404.66
  5. Step 5: Solve for x
    x = 11,404.66/112.90
  6. Step 6: Final answer
    x = 101.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.