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Finding the Fourth Proportional to 123,722.66, 170,739.26 and 67,134.04

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Solution

The fourth proportional to 123,722.66, 170,739.26 and 67,134.04 is: 92,646.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,722.66 : 170,739.26 = 67,134.04 : x
  2. Step 2: Convert to fraction form
    123,722.66/170,739.26 = 67,134.04/x
  3. Step 3: Cross multiply
    123,722.66x = 170,739.26 × 67,134.04
  4. Step 4: Simplify right side
    123,722.66x = 11,462,415,799.64
  5. Step 5: Solve for x
    x = 11,462,415,799.64/123,722.66
  6. Step 6: Final answer
    x = 92,646.05

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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.