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Finding the Fourth Proportional to 206,614.64, 285,106.28 and 115,980.56

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Solution

The fourth proportional to 206,614.64, 285,106.28 and 115,980.56 is: 160,040.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,614.64 : 285,106.28 = 115,980.56 : x
  2. Step 2: Convert to fraction form
    206,614.64/285,106.28 = 115,980.56/x
  3. Step 3: Cross multiply
    206,614.64x = 285,106.28 × 115,980.56
  4. Step 4: Simplify right side
    206,614.64x = 33,066,786,013.92
  5. Step 5: Solve for x
    x = 33,066,786,013.92/206,614.64
  6. Step 6: Final answer
    x = 160,040.87

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1.5x scale

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.