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Finding the Fourth Proportional to 71.06, 97.44 and 67.28

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Solution

The fourth proportional to 71.06, 97.44 and 67.28 is: 92.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.06 : 97.44 = 67.28 : x
  2. Step 2: Convert to fraction form
    71.06/97.44 = 67.28/x
  3. Step 3: Cross multiply
    71.06x = 97.44 × 67.28
  4. Step 4: Simplify right side
    71.06x = 6,555.76
  5. Step 5: Solve for x
    x = 6,555.76/71.06
  6. Step 6: Final answer
    x = 92.26

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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.