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Finding the Fourth Proportional to 174,638.80, 261,785.40 and 85,819.60

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Solution

The fourth proportional to 174,638.80, 261,785.40 and 85,819.60 is: 128,644.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,638.80 : 261,785.40 = 85,819.60 : x
  2. Step 2: Convert to fraction form
    174,638.80/261,785.40 = 85,819.60/x
  3. Step 3: Cross multiply
    174,638.80x = 261,785.40 × 85,819.60
  4. Step 4: Simplify right side
    174,638.80x = 22,466,318,313.84
  5. Step 5: Solve for x
    x = 22,466,318,313.84/174,638.80
  6. Step 6: Final answer
    x = 128,644.48

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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.