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Finding the Fourth Proportional to 230,313.05, 317,827.21 and 128,338.10

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Solution

The fourth proportional to 230,313.05, 317,827.21 and 128,338.10 is: 177,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,313.05 : 317,827.21 = 128,338.10 : x
  2. Step 2: Convert to fraction form
    230,313.05/317,827.21 = 128,338.10/x
  3. Step 3: Cross multiply
    230,313.05x = 317,827.21 × 128,338.10
  4. Step 4: Simplify right side
    230,313.05x = 40,789,340,259.70
  5. Step 5: Solve for x
    x = 40,789,340,259.70/230,313.05
  6. Step 6: Final answer
    x = 177,103.90

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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.