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Finding the Fourth Proportional to 87,458.90, 120,692.20 and 49,218.52

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Solution

The fourth proportional to 87,458.90, 120,692.20 and 49,218.52 is: 67,920.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,458.90 : 120,692.20 = 49,218.52 : x
  2. Step 2: Convert to fraction form
    87,458.90/120,692.20 = 49,218.52/x
  3. Step 3: Cross multiply
    87,458.90x = 120,692.20 × 49,218.52
  4. Step 4: Simplify right side
    87,458.90x = 5,940,291,491.78
  5. Step 5: Solve for x
    x = 5,940,291,491.78/87,458.90
  6. Step 6: Final answer
    x = 67,920.95

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.