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Finding the Fourth Proportional to 56,857.68, 85,286.16 and 19,399.68

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Solution

The fourth proportional to 56,857.68, 85,286.16 and 19,399.68 is: 29,099.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,857.68 : 85,286.16 = 19,399.68 : x
  2. Step 2: Convert to fraction form
    56,857.68/85,286.16 = 19,399.68/x
  3. Step 3: Cross multiply
    56,857.68x = 85,286.16 × 19,399.68
  4. Step 4: Simplify right side
    56,857.68x = 1,654,524,212.43
  5. Step 5: Solve for x
    x = 1,654,524,212.43/56,857.68
  6. Step 6: Final answer
    x = 29,099.40

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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.