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Finding the Fourth Proportional to 219,833.49, 329,528.70 and 86,662.20

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Solution

The fourth proportional to 219,833.49, 329,528.70 and 86,662.20 is: 129,905.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,833.49 : 329,528.70 = 86,662.20 : x
  2. Step 2: Convert to fraction form
    219,833.49/329,528.70 = 86,662.20/x
  3. Step 3: Cross multiply
    219,833.49x = 329,528.70 × 86,662.20
  4. Step 4: Simplify right side
    219,833.49x = 28,557,682,105.14
  5. Step 5: Solve for x
    x = 28,557,682,105.14/219,833.49
  6. Step 6: Final answer
    x = 129,905.97

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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.