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Finding the Fourth Proportional to 79.03, 108.91 and 71.54

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Solution

The fourth proportional to 79.03, 108.91 and 71.54 is: 98.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.03 : 108.91 = 71.54 : x
  2. Step 2: Convert to fraction form
    79.03/108.91 = 71.54/x
  3. Step 3: Cross multiply
    79.03x = 108.91 × 71.54
  4. Step 4: Simplify right side
    79.03x = 7,791.42
  5. Step 5: Solve for x
    x = 7,791.42/79.03
  6. Step 6: Final answer
    x = 98.59

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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.