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Finding the Fourth Proportional to 123,446.60, 170,355.46 and 66,856.84

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Solution

The fourth proportional to 123,446.60, 170,355.46 and 66,856.84 is: 92,261.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,446.60 : 170,355.46 = 66,856.84 : x
  2. Step 2: Convert to fraction form
    123,446.60/170,355.46 = 66,856.84/x
  3. Step 3: Cross multiply
    123,446.60x = 170,355.46 × 66,856.84
  4. Step 4: Simplify right side
    123,446.60x = 11,389,427,732.35
  5. Step 5: Solve for x
    x = 11,389,427,732.35/123,446.60
  6. Step 6: Final answer
    x = 92,261.98

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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.