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Finding the Fourth Proportional to 191,481.28, 287,222.08 and 86,177.28

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Solution

The fourth proportional to 191,481.28, 287,222.08 and 86,177.28 is: 129,265.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,481.28 : 287,222.08 = 86,177.28 : x
  2. Step 2: Convert to fraction form
    191,481.28/287,222.08 = 86,177.28/x
  3. Step 3: Cross multiply
    191,481.28x = 287,222.08 × 86,177.28
  4. Step 4: Simplify right side
    191,481.28x = 24,752,017,610.34
  5. Step 5: Solve for x
    x = 24,752,017,610.34/191,481.28
  6. Step 6: Final answer
    x = 129,265.99

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1.5x scale

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.