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Finding the Fourth Proportional to 63.52, 87.04 and 61.28

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Solution

The fourth proportional to 63.52, 87.04 and 61.28 is: 83.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.52 : 87.04 = 61.28 : x
  2. Step 2: Convert to fraction form
    63.52/87.04 = 61.28/x
  3. Step 3: Cross multiply
    63.52x = 87.04 × 61.28
  4. Step 4: Simplify right side
    63.52x = 5,333.81
  5. Step 5: Solve for x
    x = 5,333.81/63.52
  6. Step 6: Final answer
    x = 83.97

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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.