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Finding the Fourth Proportional to 74.62, 111.91 and 26.51

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Solution

The fourth proportional to 74.62, 111.91 and 26.51 is: 39.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.62 : 111.91 = 26.51 : x
  2. Step 2: Convert to fraction form
    74.62/111.91 = 26.51/x
  3. Step 3: Cross multiply
    74.62x = 111.91 × 26.51
  4. Step 4: Simplify right side
    74.62x = 2,966.73
  5. Step 5: Solve for x
    x = 2,966.73/74.62
  6. Step 6: Final answer
    x = 39.76

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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.