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Finding the Fourth Proportional to 67.02, 92.38 and 54.76

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Solution

The fourth proportional to 67.02, 92.38 and 54.76 is: 75.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.02 : 92.38 = 54.76 : x
  2. Step 2: Convert to fraction form
    67.02/92.38 = 54.76/x
  3. Step 3: Cross multiply
    67.02x = 92.38 × 54.76
  4. Step 4: Simplify right side
    67.02x = 5,058.73
  5. Step 5: Solve for x
    x = 5,058.73/67.02
  6. Step 6: Final answer
    x = 75.48

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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.