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Finding the Fourth Proportional to 79.15, 109.23 and 50.03

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Solution

The fourth proportional to 79.15, 109.23 and 50.03 is: 69.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.15 : 109.23 = 50.03 : x
  2. Step 2: Convert to fraction form
    79.15/109.23 = 50.03/x
  3. Step 3: Cross multiply
    79.15x = 109.23 × 50.03
  4. Step 4: Simplify right side
    79.15x = 5,464.78
  5. Step 5: Solve for x
    x = 5,464.78/79.15
  6. Step 6: Final answer
    x = 69.04

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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.