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Finding the Fourth Proportional to 74.36, 112.07 and 73.73

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Solution

The fourth proportional to 74.36, 112.07 and 73.73 is: 111.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.36 : 112.07 = 73.73 : x
  2. Step 2: Convert to fraction form
    74.36/112.07 = 73.73/x
  3. Step 3: Cross multiply
    74.36x = 112.07 × 73.73
  4. Step 4: Simplify right side
    74.36x = 8,262.92
  5. Step 5: Solve for x
    x = 8,262.92/74.36
  6. Step 6: Final answer
    x = 111.12

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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.