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Finding the Fourth Proportional to 129,047.96, 178,105.56 and 92,869.18

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Solution

The fourth proportional to 129,047.96, 178,105.56 and 92,869.18 is: 128,173.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,047.96 : 178,105.56 = 92,869.18 : x
  2. Step 2: Convert to fraction form
    129,047.96/178,105.56 = 92,869.18/x
  3. Step 3: Cross multiply
    129,047.96x = 178,105.56 × 92,869.18
  4. Step 4: Simplify right side
    129,047.96x = 16,540,517,310.64
  5. Step 5: Solve for x
    x = 16,540,517,310.64/129,047.96
  6. Step 6: Final answer
    x = 128,173.41

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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.