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Finding the Fourth Proportional to 79.31, 118.95 and 27.99

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Solution

The fourth proportional to 79.31, 118.95 and 27.99 is: 41.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.31 : 118.95 = 27.99 : x
  2. Step 2: Convert to fraction form
    79.31/118.95 = 27.99/x
  3. Step 3: Cross multiply
    79.31x = 118.95 × 27.99
  4. Step 4: Simplify right side
    79.31x = 3,328.82
  5. Step 5: Solve for x
    x = 3,328.82/79.31
  6. Step 6: Final answer
    x = 41.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.