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Finding the Fourth Proportional to 74.32, 111.51 and 35.81

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Solution

The fourth proportional to 74.32, 111.51 and 35.81 is: 53.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.32 : 111.51 = 35.81 : x
  2. Step 2: Convert to fraction form
    74.32/111.51 = 35.81/x
  3. Step 3: Cross multiply
    74.32x = 111.51 × 35.81
  4. Step 4: Simplify right side
    74.32x = 3,993.03
  5. Step 5: Solve for x
    x = 3,993.03/74.32
  6. Step 6: Final answer
    x = 53.73

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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.