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Finding the Fourth Proportional to 97.92, 147.06 and 79.92

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Solution

The fourth proportional to 97.92, 147.06 and 79.92 is: 120.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.92 : 147.06 = 79.92 : x
  2. Step 2: Convert to fraction form
    97.92/147.06 = 79.92/x
  3. Step 3: Cross multiply
    97.92x = 147.06 × 79.92
  4. Step 4: Simplify right side
    97.92x = 11,753.04
  5. Step 5: Solve for x
    x = 11,753.04/97.92
  6. Step 6: Final answer
    x = 120.03

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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.