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Finding the Fourth Proportional to 171,353.28, 256,877.34 and 81,340.46

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Solution

The fourth proportional to 171,353.28, 256,877.34 and 81,340.46 is: 121,938.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,353.28 : 256,877.34 = 81,340.46 : x
  2. Step 2: Convert to fraction form
    171,353.28/256,877.34 = 81,340.46/x
  3. Step 3: Cross multiply
    171,353.28x = 256,877.34 × 81,340.46
  4. Step 4: Simplify right side
    171,353.28x = 20,894,519,714.79
  5. Step 5: Solve for x
    x = 20,894,519,714.79/171,353.28
  6. Step 6: Final answer
    x = 121,938.25

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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.