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Finding the Fourth Proportional to 186,808.80, 279,905.40 and 107,785.20

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Solution

The fourth proportional to 186,808.80, 279,905.40 and 107,785.20 is: 161,500.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,808.80 : 279,905.40 = 107,785.20 : x
  2. Step 2: Convert to fraction form
    186,808.80/279,905.40 = 107,785.20/x
  3. Step 3: Cross multiply
    186,808.80x = 279,905.40 × 107,785.20
  4. Step 4: Simplify right side
    186,808.80x = 30,169,659,520.08
  5. Step 5: Solve for x
    x = 30,169,659,520.08/186,808.80
  6. Step 6: Final answer
    x = 161,500.21

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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.