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Finding the Fourth Proportional to 112.93, 169.36 and 67.19

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Solution

The fourth proportional to 112.93, 169.36 and 67.19 is: 100.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.93 : 169.36 = 67.19 : x
  2. Step 2: Convert to fraction form
    112.93/169.36 = 67.19/x
  3. Step 3: Cross multiply
    112.93x = 169.36 × 67.19
  4. Step 4: Simplify right side
    112.93x = 11,378.28
  5. Step 5: Solve for x
    x = 11,378.28/112.93
  6. Step 6: Final answer
    x = 100.76

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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.