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Finding the Fourth Proportional to 206,185.62, 308,753.40 and 135,851.70

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Solution

The fourth proportional to 206,185.62, 308,753.40 and 135,851.70 is: 203,431.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,185.62 : 308,753.40 = 135,851.70 : x
  2. Step 2: Convert to fraction form
    206,185.62/308,753.40 = 135,851.70/x
  3. Step 3: Cross multiply
    206,185.62x = 308,753.40 × 135,851.70
  4. Step 4: Simplify right side
    206,185.62x = 41,944,674,270.78
  5. Step 5: Solve for x
    x = 41,944,674,270.78/206,185.62
  6. Step 6: Final answer
    x = 203,431.62

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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.