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Finding the Fourth Proportional to 138,596.57, 191,180.71 and 87,519.18

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Solution

The fourth proportional to 138,596.57, 191,180.71 and 87,519.18 is: 120,724.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,596.57 : 191,180.71 = 87,519.18 : x
  2. Step 2: Convert to fraction form
    138,596.57/191,180.71 = 87,519.18/x
  3. Step 3: Cross multiply
    138,596.57x = 191,180.71 × 87,519.18
  4. Step 4: Simplify right side
    138,596.57x = 16,731,979,305.05
  5. Step 5: Solve for x
    x = 16,731,979,305.05/138,596.57
  6. Step 6: Final answer
    x = 120,724.34

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1.5x scale

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.