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Finding the Fourth Proportional to 79.17, 109.43 and 63.73

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Solution

The fourth proportional to 79.17, 109.43 and 63.73 is: 88.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.17 : 109.43 = 63.73 : x
  2. Step 2: Convert to fraction form
    79.17/109.43 = 63.73/x
  3. Step 3: Cross multiply
    79.17x = 109.43 × 63.73
  4. Step 4: Simplify right side
    79.17x = 6,973.97
  5. Step 5: Solve for x
    x = 6,973.97/79.17
  6. Step 6: Final answer
    x = 88.09

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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.