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Finding the Fourth Proportional to 109.19, 162.68 and 104.03

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Solution

The fourth proportional to 109.19, 162.68 and 104.03 is: 154.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.19 : 162.68 = 104.03 : x
  2. Step 2: Convert to fraction form
    109.19/162.68 = 104.03/x
  3. Step 3: Cross multiply
    109.19x = 162.68 × 104.03
  4. Step 4: Simplify right side
    109.19x = 16,922.27
  5. Step 5: Solve for x
    x = 16,922.27/109.19
  6. Step 6: Final answer
    x = 154.99

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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.