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Finding the Fourth Proportional to 256,781.53, 354,370.71 and 142,059.61

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Solution

The fourth proportional to 256,781.53, 354,370.71 and 142,059.61 is: 196,049.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,781.53 : 354,370.71 = 142,059.61 : x
  2. Step 2: Convert to fraction form
    256,781.53/354,370.71 = 142,059.61/x
  3. Step 3: Cross multiply
    256,781.53x = 354,370.71 × 142,059.61
  4. Step 4: Simplify right side
    256,781.53x = 50,341,764,858.02
  5. Step 5: Solve for x
    x = 50,341,764,858.02/256,781.53
  6. Step 6: Final answer
    x = 196,049.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.