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Finding the Fourth Proportional to 209,986.30, 289,773.87 and 119,340.68

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Solution

The fourth proportional to 209,986.30, 289,773.87 and 119,340.68 is: 164,686.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,986.30 : 289,773.87 = 119,340.68 : x
  2. Step 2: Convert to fraction form
    209,986.30/289,773.87 = 119,340.68/x
  3. Step 3: Cross multiply
    209,986.30x = 289,773.87 × 119,340.68
  4. Step 4: Simplify right side
    209,986.30x = 34,581,810,692.03
  5. Step 5: Solve for x
    x = 34,581,810,692.03/209,986.30
  6. Step 6: Final answer
    x = 164,686.03

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Why These Related Problems?

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