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Finding the Fourth Proportional to 206,571.90, 309,901.05 and 66,344.70

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Solution

The fourth proportional to 206,571.90, 309,901.05 and 66,344.70 is: 99,530.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,571.90 : 309,901.05 = 66,344.70 : x
  2. Step 2: Convert to fraction form
    206,571.90/309,901.05 = 66,344.70/x
  3. Step 3: Cross multiply
    206,571.90x = 309,901.05 × 66,344.70
  4. Step 4: Simplify right side
    206,571.90x = 20,560,292,191.94
  5. Step 5: Solve for x
    x = 20,560,292,191.94/206,571.90
  6. Step 6: Final answer
    x = 99,530.92

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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.