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Finding the Fourth Proportional to 186,391.80, 279,311.22 and 136,901.88

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Solution

The fourth proportional to 186,391.80, 279,311.22 and 136,901.88 is: 205,149.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,391.80 : 279,311.22 = 136,901.88 : x
  2. Step 2: Convert to fraction form
    186,391.80/279,311.22 = 136,901.88/x
  3. Step 3: Cross multiply
    186,391.80x = 279,311.22 × 136,901.88
  4. Step 4: Simplify right side
    186,391.80x = 38,238,231,123.09
  5. Step 5: Solve for x
    x = 38,238,231,123.09/186,391.80
  6. Step 6: Final answer
    x = 205,149.75

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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.