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Finding the Fourth Proportional to 169,238.73, 253,858.10 and 86,191.05

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Solution

The fourth proportional to 169,238.73, 253,858.10 and 86,191.05 is: 129,286.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,238.73 : 253,858.10 = 86,191.05 : x
  2. Step 2: Convert to fraction form
    169,238.73/253,858.10 = 86,191.05/x
  3. Step 3: Cross multiply
    169,238.73x = 253,858.10 × 86,191.05
  4. Step 4: Simplify right side
    169,238.73x = 21,880,295,759.05
  5. Step 5: Solve for x
    x = 21,880,295,759.05/169,238.73
  6. Step 6: Final answer
    x = 129,286.58

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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.