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Finding the Fourth Proportional to 79.24, 108.92 and 68.32

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Solution

The fourth proportional to 79.24, 108.92 and 68.32 is: 93.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.24 : 108.92 = 68.32 : x
  2. Step 2: Convert to fraction form
    79.24/108.92 = 68.32/x
  3. Step 3: Cross multiply
    79.24x = 108.92 × 68.32
  4. Step 4: Simplify right side
    79.24x = 7,441.41
  5. Step 5: Solve for x
    x = 7,441.41/79.24
  6. Step 6: Final answer
    x = 93.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.