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Finding the Fourth Proportional to 206,699.08, 309,987 and 80,358.94

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Solution

The fourth proportional to 206,699.08, 309,987 and 80,358.94 is: 120,514.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,699.08 : 309,987 = 80,358.94 : x
  2. Step 2: Convert to fraction form
    206,699.08/309,987 = 80,358.94/x
  3. Step 3: Cross multiply
    206,699.08x = 309,987 × 80,358.94
  4. Step 4: Simplify right side
    206,699.08x = 24,910,226,733.78
  5. Step 5: Solve for x
    x = 24,910,226,733.78/206,699.08
  6. Step 6: Final answer
    x = 120,514.45

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1.5x scale

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.