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Finding the Fourth Proportional to 209,190.70, 288,685.41 and 113,697.40

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Solution

The fourth proportional to 209,190.70, 288,685.41 and 113,697.40 is: 156,903.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,190.70 : 288,685.41 = 113,697.40 : x
  2. Step 2: Convert to fraction form
    209,190.70/288,685.41 = 113,697.40/x
  3. Step 3: Cross multiply
    209,190.70x = 288,685.41 × 113,697.40
  4. Step 4: Simplify right side
    209,190.70x = 32,822,780,534.93
  5. Step 5: Solve for x
    x = 32,822,780,534.93/209,190.70
  6. Step 6: Final answer
    x = 156,903.63

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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.