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Finding the Fourth Proportional to 79.92, 119.67 and 62.64

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Solution

The fourth proportional to 79.92, 119.67 and 62.64 is: 93.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.92 : 119.67 = 62.64 : x
  2. Step 2: Convert to fraction form
    79.92/119.67 = 62.64/x
  3. Step 3: Cross multiply
    79.92x = 119.67 × 62.64
  4. Step 4: Simplify right side
    79.92x = 7,496.13
  5. Step 5: Solve for x
    x = 7,496.13/79.92
  6. Step 6: Final answer
    x = 93.80

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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.