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Finding the Fourth Proportional to 59.72, 81.92 and 54.86

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Solution

The fourth proportional to 59.72, 81.92 and 54.86 is: 75.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.72 : 81.92 = 54.86 : x
  2. Step 2: Convert to fraction form
    59.72/81.92 = 54.86/x
  3. Step 3: Cross multiply
    59.72x = 81.92 × 54.86
  4. Step 4: Simplify right side
    59.72x = 4,494.06
  5. Step 5: Solve for x
    x = 4,494.06/59.72
  6. Step 6: Final answer
    x = 75.25

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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.