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Finding the Fourth Proportional to 66.97, 92.51 and 54.82

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Solution

The fourth proportional to 66.97, 92.51 and 54.82 is: 75.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.97 : 92.51 = 54.82 : x
  2. Step 2: Convert to fraction form
    66.97/92.51 = 54.82/x
  3. Step 3: Cross multiply
    66.97x = 92.51 × 54.82
  4. Step 4: Simplify right side
    66.97x = 5,071.40
  5. Step 5: Solve for x
    x = 5,071.40/66.97
  6. Step 6: Final answer
    x = 75.73

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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.