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Finding the Fourth Proportional to 230,374.11, 317,905.07 and 128,410.71

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Solution

The fourth proportional to 230,374.11, 317,905.07 and 128,410.71 is: 177,200.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,374.11 : 317,905.07 = 128,410.71 : x
  2. Step 2: Convert to fraction form
    230,374.11/317,905.07 = 128,410.71/x
  3. Step 3: Cross multiply
    230,374.11x = 317,905.07 × 128,410.71
  4. Step 4: Simplify right side
    230,374.11x = 40,822,415,751.30
  5. Step 5: Solve for x
    x = 40,822,415,751.30/230,374.11
  6. Step 6: Final answer
    x = 177,200.54

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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.