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Finding the Fourth Proportional to 203,930.80, 306,005.55 and 85,614.10

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Solution

The fourth proportional to 203,930.80, 306,005.55 and 85,614.10 is: 128,467.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,930.80 : 306,005.55 = 85,614.10 : x
  2. Step 2: Convert to fraction form
    203,930.80/306,005.55 = 85,614.10/x
  3. Step 3: Cross multiply
    203,930.80x = 306,005.55 × 85,614.10
  4. Step 4: Simplify right side
    203,930.80x = 26,198,389,758.26
  5. Step 5: Solve for x
    x = 26,198,389,758.26/203,930.80
  6. Step 6: Final answer
    x = 128,467.06

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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.