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Finding the Fourth Proportional to 79.32, 108.58 and 76.26

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Solution

The fourth proportional to 79.32, 108.58 and 76.26 is: 104.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.32 : 108.58 = 76.26 : x
  2. Step 2: Convert to fraction form
    79.32/108.58 = 76.26/x
  3. Step 3: Cross multiply
    79.32x = 108.58 × 76.26
  4. Step 4: Simplify right side
    79.32x = 8,280.31
  5. Step 5: Solve for x
    x = 8,280.31/79.32
  6. Step 6: Final answer
    x = 104.39

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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.