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Finding the Fourth Proportional to 79.07, 108.95 and 76.10

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Solution

The fourth proportional to 79.07, 108.95 and 76.10 is: 104.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.07 : 108.95 = 76.10 : x
  2. Step 2: Convert to fraction form
    79.07/108.95 = 76.10/x
  3. Step 3: Cross multiply
    79.07x = 108.95 × 76.10
  4. Step 4: Simplify right side
    79.07x = 8,290.17
  5. Step 5: Solve for x
    x = 8,290.17/79.07
  6. Step 6: Final answer
    x = 104.85

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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.