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Finding the Fourth Proportional to 171,640.60, 257,460.90 and 87,659.80

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Solution

The fourth proportional to 171,640.60, 257,460.90 and 87,659.80 is: 131,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,640.60 : 257,460.90 = 87,659.80 : x
  2. Step 2: Convert to fraction form
    171,640.60/257,460.90 = 87,659.80/x
  3. Step 3: Cross multiply
    171,640.60x = 257,460.90 × 87,659.80
  4. Step 4: Simplify right side
    171,640.60x = 22,568,971,001.82
  5. Step 5: Solve for x
    x = 22,568,971,001.82/171,640.60
  6. Step 6: Final answer
    x = 131,489.70

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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.