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Finding the Fourth Proportional to 206,814.12, 285,359.22 and 120,734.04

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Solution

The fourth proportional to 206,814.12, 285,359.22 and 120,734.04 is: 166,587.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,814.12 : 285,359.22 = 120,734.04 : x
  2. Step 2: Convert to fraction form
    206,814.12/285,359.22 = 120,734.04/x
  3. Step 3: Cross multiply
    206,814.12x = 285,359.22 × 120,734.04
  4. Step 4: Simplify right side
    206,814.12x = 34,452,571,481.85
  5. Step 5: Solve for x
    x = 34,452,571,481.85/206,814.12
  6. Step 6: Final answer
    x = 166,587.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.