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Finding the Fourth Proportional to 63.55, 87.65 and 41.75

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Solution

The fourth proportional to 63.55, 87.65 and 41.75 is: 57.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.55 : 87.65 = 41.75 : x
  2. Step 2: Convert to fraction form
    63.55/87.65 = 41.75/x
  3. Step 3: Cross multiply
    63.55x = 87.65 × 41.75
  4. Step 4: Simplify right side
    63.55x = 3,659.39
  5. Step 5: Solve for x
    x = 3,659.39/63.55
  6. Step 6: Final answer
    x = 57.58

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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.