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Finding the Fourth Proportional to 79.70, 110.13 and 57.92

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Solution

The fourth proportional to 79.70, 110.13 and 57.92 is: 80.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.70 : 110.13 = 57.92 : x
  2. Step 2: Convert to fraction form
    79.70/110.13 = 57.92/x
  3. Step 3: Cross multiply
    79.70x = 110.13 × 57.92
  4. Step 4: Simplify right side
    79.70x = 6,378.73
  5. Step 5: Solve for x
    x = 6,378.73/79.70
  6. Step 6: Final answer
    x = 80.03

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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.