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Finding the Fourth Proportional to 120,907.68, 166,849.26 and 67,191.31

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Solution

The fourth proportional to 120,907.68, 166,849.26 and 67,191.31 is: 92,722.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,907.68 : 166,849.26 = 67,191.31 : x
  2. Step 2: Convert to fraction form
    120,907.68/166,849.26 = 67,191.31/x
  3. Step 3: Cross multiply
    120,907.68x = 166,849.26 × 67,191.31
  4. Step 4: Simplify right side
    120,907.68x = 11,210,820,351.93
  5. Step 5: Solve for x
    x = 11,210,820,351.93/120,907.68
  6. Step 6: Final answer
    x = 92,722.15

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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.