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Finding the Fourth Proportional to 56,912.70, 85,417.65 and 25,371.30

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Solution

The fourth proportional to 56,912.70, 85,417.65 and 25,371.30 is: 38,078.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,912.70 : 85,417.65 = 25,371.30 : x
  2. Step 2: Convert to fraction form
    56,912.70/85,417.65 = 25,371.30/x
  3. Step 3: Cross multiply
    56,912.70x = 85,417.65 × 25,371.30
  4. Step 4: Simplify right side
    56,912.70x = 2,167,156,823.45
  5. Step 5: Solve for x
    x = 2,167,156,823.45/56,912.70
  6. Step 6: Final answer
    x = 38,078.62

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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.