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Finding the Fourth Proportional to 79.22, 118.28 and 69.03

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Solution

The fourth proportional to 79.22, 118.28 and 69.03 is: 103.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.22 : 118.28 = 69.03 : x
  2. Step 2: Convert to fraction form
    79.22/118.28 = 69.03/x
  3. Step 3: Cross multiply
    79.22x = 118.28 × 69.03
  4. Step 4: Simplify right side
    79.22x = 8,165.04
  5. Step 5: Solve for x
    x = 8,165.04/79.22
  6. Step 6: Final answer
    x = 103.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.