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Finding the Fourth Proportional to 206,542.80, 309,814.20 and 154,054.80

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Solution

The fourth proportional to 206,542.80, 309,814.20 and 154,054.80 is: 231,082.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,542.80 : 309,814.20 = 154,054.80 : x
  2. Step 2: Convert to fraction form
    206,542.80/309,814.20 = 154,054.80/x
  3. Step 3: Cross multiply
    206,542.80x = 309,814.20 × 154,054.80
  4. Step 4: Simplify right side
    206,542.80x = 47,728,364,618.16
  5. Step 5: Solve for x
    x = 47,728,364,618.16/206,542.80
  6. Step 6: Final answer
    x = 231,082.20

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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.