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Finding the Fourth Proportional to 71.03, 97.66 and 63.18

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Solution

The fourth proportional to 71.03, 97.66 and 63.18 is: 86.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.03 : 97.66 = 63.18 : x
  2. Step 2: Convert to fraction form
    71.03/97.66 = 63.18/x
  3. Step 3: Cross multiply
    71.03x = 97.66 × 63.18
  4. Step 4: Simplify right side
    71.03x = 6,169.88
  5. Step 5: Solve for x
    x = 6,169.88/71.03
  6. Step 6: Final answer
    x = 86.87

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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.