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Finding the Fourth Proportional to 74.26, 112.03 and 68.38

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Solution

The fourth proportional to 74.26, 112.03 and 68.38 is: 103.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.26 : 112.03 = 68.38 : x
  2. Step 2: Convert to fraction form
    74.26/112.03 = 68.38/x
  3. Step 3: Cross multiply
    74.26x = 112.03 × 68.38
  4. Step 4: Simplify right side
    74.26x = 7,660.61
  5. Step 5: Solve for x
    x = 7,660.61/74.26
  6. Step 6: Final answer
    x = 103.16

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.