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Finding the Fourth Proportional to 79.23, 118.74 and 33.57

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Solution

The fourth proportional to 79.23, 118.74 and 33.57 is: 50.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.23 : 118.74 = 33.57 : x
  2. Step 2: Convert to fraction form
    79.23/118.74 = 33.57/x
  3. Step 3: Cross multiply
    79.23x = 118.74 × 33.57
  4. Step 4: Simplify right side
    79.23x = 3,986.23
  5. Step 5: Solve for x
    x = 3,986.23/79.23
  6. Step 6: Final answer
    x = 50.31

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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.