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Finding the Fourth Proportional to 74.06, 111.08 and 19.96

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Solution

The fourth proportional to 74.06, 111.08 and 19.96 is: 29.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.06 : 111.08 = 19.96 : x
  2. Step 2: Convert to fraction form
    74.06/111.08 = 19.96/x
  3. Step 3: Cross multiply
    74.06x = 111.08 × 19.96
  4. Step 4: Simplify right side
    74.06x = 2,216.78
  5. Step 5: Solve for x
    x = 2,216.78/74.06
  6. Step 6: Final answer
    x = 29.93

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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.