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Finding the Fourth Proportional to 67.26, 92.70 and 54.30

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Solution

The fourth proportional to 67.26, 92.70 and 54.30 is: 74.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.26 : 92.70 = 54.30 : x
  2. Step 2: Convert to fraction form
    67.26/92.70 = 54.30/x
  3. Step 3: Cross multiply
    67.26x = 92.70 × 54.30
  4. Step 4: Simplify right side
    67.26x = 5,033.61
  5. Step 5: Solve for x
    x = 5,033.61/67.26
  6. Step 6: Final answer
    x = 74.84

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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.