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Finding the Fourth Proportional to 171,640.62, 257,125.72 and 81,555.12

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Solution

The fourth proportional to 171,640.62, 257,125.72 and 81,555.12 is: 122,173.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,640.62 : 257,125.72 = 81,555.12 : x
  2. Step 2: Convert to fraction form
    171,640.62/257,125.72 = 81,555.12/x
  3. Step 3: Cross multiply
    171,640.62x = 257,125.72 × 81,555.12
  4. Step 4: Simplify right side
    171,640.62x = 20,969,918,949.69
  5. Step 5: Solve for x
    x = 20,969,918,949.69/171,640.62
  6. Step 6: Final answer
    x = 122,173.40

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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.