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Finding the Fourth Proportional to 171,057.60, 256,586.40 and 86,785.20

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Solution

The fourth proportional to 171,057.60, 256,586.40 and 86,785.20 is: 130,177.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,057.60 : 256,586.40 = 86,785.20 : x
  2. Step 2: Convert to fraction form
    171,057.60/256,586.40 = 86,785.20/x
  3. Step 3: Cross multiply
    171,057.60x = 256,586.40 × 86,785.20
  4. Step 4: Simplify right side
    171,057.60x = 22,267,902,041.28
  5. Step 5: Solve for x
    x = 22,267,902,041.28/171,057.60
  6. Step 6: Final answer
    x = 130,177.80

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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.