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Finding the Fourth Proportional to 123,681, 170,679.87 and 67,092.60

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Solution

The fourth proportional to 123,681, 170,679.87 and 67,092.60 is: 92,587.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,681 : 170,679.87 = 67,092.60 : x
  2. Step 2: Convert to fraction form
    123,681/170,679.87 = 67,092.60/x
  3. Step 3: Cross multiply
    123,681x = 170,679.87 × 67,092.60
  4. Step 4: Simplify right side
    123,681x = 11,451,356,245.96
  5. Step 5: Solve for x
    x = 11,451,356,245.96/123,681
  6. Step 6: Final answer
    x = 92,587.84

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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.