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Finding the Fourth Proportional to 185,665.34, 278,411.60 and 67,331.90

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Solution

The fourth proportional to 185,665.34, 278,411.60 and 67,331.90 is: 100,966.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,665.34 : 278,411.60 = 67,331.90 : x
  2. Step 2: Convert to fraction form
    185,665.34/278,411.60 = 67,331.90/x
  3. Step 3: Cross multiply
    185,665.34x = 278,411.60 × 67,331.90
  4. Step 4: Simplify right side
    185,665.34x = 18,745,980,786.31
  5. Step 5: Solve for x
    x = 18,745,980,786.31/185,665.34
  6. Step 6: Final answer
    x = 100,966.51

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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.