Home / 206,128.20-309,065.94-87,732.12

Finding the Fourth Proportional to 206,128.20, 309,065.94 and 87,732.12

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Solution

The fourth proportional to 206,128.20, 309,065.94 and 87,732.12 is: 131,544.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,128.20 : 309,065.94 = 87,732.12 : x
  2. Step 2: Convert to fraction form
    206,128.20/309,065.94 = 87,732.12/x
  3. Step 3: Cross multiply
    206,128.20x = 309,065.94 × 87,732.12
  4. Step 4: Simplify right side
    206,128.20x = 27,115,010,135.99
  5. Step 5: Solve for x
    x = 27,115,010,135.99/206,128.20
  6. Step 6: Final answer
    x = 131,544.40

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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.