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Finding the Fourth Proportional to 57,218.90, 85,905.30 and 33,550.70

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Solution

The fourth proportional to 57,218.90, 85,905.30 and 33,550.70 is: 50,371.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,218.90 : 85,905.30 = 33,550.70 : x
  2. Step 2: Convert to fraction form
    57,218.90/85,905.30 = 33,550.70/x
  3. Step 3: Cross multiply
    57,218.90x = 85,905.30 × 33,550.70
  4. Step 4: Simplify right side
    57,218.90x = 2,882,182,948.71
  5. Step 5: Solve for x
    x = 2,882,182,948.71/57,218.90
  6. Step 6: Final answer
    x = 50,371.17

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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.