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Finding the Fourth Proportional to 191,809.92, 287,760.24 and 86,628.18

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Solution

The fourth proportional to 191,809.92, 287,760.24 and 86,628.18 is: 129,962.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,809.92 : 287,760.24 = 86,628.18 : x
  2. Step 2: Convert to fraction form
    191,809.92/287,760.24 = 86,628.18/x
  3. Step 3: Cross multiply
    191,809.92x = 287,760.24 × 86,628.18
  4. Step 4: Simplify right side
    191,809.92x = 24,928,145,867.56
  5. Step 5: Solve for x
    x = 24,928,145,867.56/191,809.92
  6. Step 6: Final answer
    x = 129,962.76

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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.