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Finding the Fourth Proportional to 157,043.38, 216,725.61 and 87,194.65

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Solution

The fourth proportional to 157,043.38, 216,725.61 and 87,194.65 is: 120,331.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,043.38 : 216,725.61 = 87,194.65 : x
  2. Step 2: Convert to fraction form
    157,043.38/216,725.61 = 87,194.65/x
  3. Step 3: Cross multiply
    157,043.38x = 216,725.61 × 87,194.65
  4. Step 4: Simplify right side
    157,043.38x = 18,897,313,709.99
  5. Step 5: Solve for x
    x = 18,897,313,709.99/157,043.38
  6. Step 6: Final answer
    x = 120,331.81

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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.