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Finding the Fourth Proportional to 67, 92.46 and 38.99

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Solution

The fourth proportional to 67, 92.46 and 38.99 is: 53.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67 : 92.46 = 38.99 : x
  2. Step 2: Convert to fraction form
    67/92.46 = 38.99/x
  3. Step 3: Cross multiply
    67x = 92.46 × 38.99
  4. Step 4: Simplify right side
    67x = 3,605.25
  5. Step 5: Solve for x
    x = 3,605.25/67
  6. Step 6: Final answer
    x = 53.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.