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Finding the Fourth Proportional to 186,768.60, 279,982.80 and 68,411.40

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Solution

The fourth proportional to 186,768.60, 279,982.80 and 68,411.40 is: 102,554.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,768.60 : 279,982.80 = 68,411.40 : x
  2. Step 2: Convert to fraction form
    186,768.60/279,982.80 = 68,411.40/x
  3. Step 3: Cross multiply
    186,768.60x = 279,982.80 × 68,411.40
  4. Step 4: Simplify right side
    186,768.60x = 19,154,015,323.92
  5. Step 5: Solve for x
    x = 19,154,015,323.92/186,768.60
  6. Step 6: Final answer
    x = 102,554.79

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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.