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Finding the Fourth Proportional to 186,517.62, 279,718.11 and 81,230.58

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Solution

The fourth proportional to 186,517.62, 279,718.11 and 81,230.58 is: 121,820.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,517.62 : 279,718.11 = 81,230.58 : x
  2. Step 2: Convert to fraction form
    186,517.62/279,718.11 = 81,230.58/x
  3. Step 3: Cross multiply
    186,517.62x = 279,718.11 × 81,230.58
  4. Step 4: Simplify right side
    186,517.62x = 22,721,664,311.80
  5. Step 5: Solve for x
    x = 22,721,664,311.80/186,517.62
  6. Step 6: Final answer
    x = 121,820.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.