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Finding the Fourth Proportional to 56,919.80, 85,374.12 and 25,330.40

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Solution

The fourth proportional to 56,919.80, 85,374.12 and 25,330.40 is: 37,993.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,919.80 : 85,374.12 = 25,330.40 : x
  2. Step 2: Convert to fraction form
    56,919.80/85,374.12 = 25,330.40/x
  3. Step 3: Cross multiply
    56,919.80x = 85,374.12 × 25,330.40
  4. Step 4: Simplify right side
    56,919.80x = 2,162,560,609.25
  5. Step 5: Solve for x
    x = 2,162,560,609.25/56,919.80
  6. Step 6: Final answer
    x = 37,993.12

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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.