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Finding the Fourth Proportional to 72,791.19, 109,186.79 and 20,200.73

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Solution

The fourth proportional to 72,791.19, 109,186.79 and 20,200.73 is: 30,301.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,791.19 : 109,186.79 = 20,200.73 : x
  2. Step 2: Convert to fraction form
    72,791.19/109,186.79 = 20,200.73/x
  3. Step 3: Cross multiply
    72,791.19x = 109,186.79 × 20,200.73
  4. Step 4: Simplify right side
    72,791.19x = 2,205,652,217.42
  5. Step 5: Solve for x
    x = 2,205,652,217.42/72,791.19
  6. Step 6: Final answer
    x = 30,301.09

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1.5x scale

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.