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Finding the Fourth Proportional to 74.05, 111.05 and 25.95

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Solution

The fourth proportional to 74.05, 111.05 and 25.95 is: 38.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.05 : 111.05 = 25.95 : x
  2. Step 2: Convert to fraction form
    74.05/111.05 = 25.95/x
  3. Step 3: Cross multiply
    74.05x = 111.05 × 25.95
  4. Step 4: Simplify right side
    74.05x = 2,881.06
  5. Step 5: Solve for x
    x = 2,881.06/74.05
  6. Step 6: Final answer
    x = 38.91

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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.