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Finding the Fourth Proportional to 79.10, 109.04 and 54.50

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Solution

The fourth proportional to 79.10, 109.04 and 54.50 is: 75.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.10 : 109.04 = 54.50 : x
  2. Step 2: Convert to fraction form
    79.10/109.04 = 54.50/x
  3. Step 3: Cross multiply
    79.10x = 109.04 × 54.50
  4. Step 4: Simplify right side
    79.10x = 5,942.68
  5. Step 5: Solve for x
    x = 5,942.68/79.10
  6. Step 6: Final answer
    x = 75.13

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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.