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Finding the Fourth Proportional to 189,380.97, 261,252.11 and 123,931.05

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Solution

The fourth proportional to 189,380.97, 261,252.11 and 123,931.05 is: 170,963.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,380.97 : 261,252.11 = 123,931.05 : x
  2. Step 2: Convert to fraction form
    189,380.97/261,252.11 = 123,931.05/x
  3. Step 3: Cross multiply
    189,380.97x = 261,252.11 × 123,931.05
  4. Step 4: Simplify right side
    189,380.97x = 32,377,247,000.76
  5. Step 5: Solve for x
    x = 32,377,247,000.76/189,380.97
  6. Step 6: Final answer
    x = 170,963.58

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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.