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Finding the Fourth Proportional to 63.77, 95.80 and 55.12

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Solution

The fourth proportional to 63.77, 95.80 and 55.12 is: 82.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.77 : 95.80 = 55.12 : x
  2. Step 2: Convert to fraction form
    63.77/95.80 = 55.12/x
  3. Step 3: Cross multiply
    63.77x = 95.80 × 55.12
  4. Step 4: Simplify right side
    63.77x = 5,280.40
  5. Step 5: Solve for x
    x = 5,280.40/63.77
  6. Step 6: Final answer
    x = 82.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.