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Finding the Fourth Proportional to 73,129.34, 109,685.49 and 20,543.33

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Solution

The fourth proportional to 73,129.34, 109,685.49 and 20,543.33 is: 30,812.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,129.34 : 109,685.49 = 20,543.33 : x
  2. Step 2: Convert to fraction form
    73,129.34/109,685.49 = 20,543.33/x
  3. Step 3: Cross multiply
    73,129.34x = 109,685.49 × 20,543.33
  4. Step 4: Simplify right side
    73,129.34x = 2,253,305,217.28
  5. Step 5: Solve for x
    x = 2,253,305,217.28/73,129.34
  6. Step 6: Final answer
    x = 30,812.60

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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.