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Finding the Fourth Proportional to 61.54, 84.46 and 54.54

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Solution

The fourth proportional to 61.54, 84.46 and 54.54 is: 74.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.54 : 84.46 = 54.54 : x
  2. Step 2: Convert to fraction form
    61.54/84.46 = 54.54/x
  3. Step 3: Cross multiply
    61.54x = 84.46 × 54.54
  4. Step 4: Simplify right side
    61.54x = 4,606.45
  5. Step 5: Solve for x
    x = 4,606.45/61.54
  6. Step 6: Final answer
    x = 74.85

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.