Home / 206,129.14-309,185.62-86,155.10

Finding the Fourth Proportional to 206,129.14, 309,185.62 and 86,155.10

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Solution

The fourth proportional to 206,129.14, 309,185.62 and 86,155.10 is: 129,229.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,129.14 : 309,185.62 = 86,155.10 : x
  2. Step 2: Convert to fraction form
    206,129.14/309,185.62 = 86,155.10/x
  3. Step 3: Cross multiply
    206,129.14x = 309,185.62 × 86,155.10
  4. Step 4: Simplify right side
    206,129.14x = 26,637,917,473.74
  5. Step 5: Solve for x
    x = 26,637,917,473.74/206,129.14
  6. Step 6: Final answer
    x = 129,229.27

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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.