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Finding the Fourth Proportional to 43,819.20, 65,728.80 and 16,113.60

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Solution

The fourth proportional to 43,819.20, 65,728.80 and 16,113.60 is: 24,170.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,819.20 : 65,728.80 = 16,113.60 : x
  2. Step 2: Convert to fraction form
    43,819.20/65,728.80 = 16,113.60/x
  3. Step 3: Cross multiply
    43,819.20x = 65,728.80 × 16,113.60
  4. Step 4: Simplify right side
    43,819.20x = 1,059,127,591.68
  5. Step 5: Solve for x
    x = 1,059,127,591.68/43,819.20
  6. Step 6: Final answer
    x = 24,170.40

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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.