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Finding the Fourth Proportional to 73,103.62, 109,659.30 and 20,517.21

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Solution

The fourth proportional to 73,103.62, 109,659.30 and 20,517.21 is: 30,776.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,103.62 : 109,659.30 = 20,517.21 : x
  2. Step 2: Convert to fraction form
    73,103.62/109,659.30 = 20,517.21/x
  3. Step 3: Cross multiply
    73,103.62x = 109,659.30 × 20,517.21
  4. Step 4: Simplify right side
    73,103.62x = 2,249,902,449.68
  5. Step 5: Solve for x
    x = 2,249,902,449.68/73,103.62
  6. Step 6: Final answer
    x = 30,776.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.