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Finding the Fourth Proportional to 67.62, 93.90 and 63.48

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Solution

The fourth proportional to 67.62, 93.90 and 63.48 is: 88.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.62 : 93.90 = 63.48 : x
  2. Step 2: Convert to fraction form
    67.62/93.90 = 63.48/x
  3. Step 3: Cross multiply
    67.62x = 93.90 × 63.48
  4. Step 4: Simplify right side
    67.62x = 5,960.77
  5. Step 5: Solve for x
    x = 5,960.77/67.62
  6. Step 6: Final answer
    x = 88.15

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.