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Finding the Fourth Proportional to 141,246.78, 194,937.78 and 81,630.78

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Solution

The fourth proportional to 141,246.78, 194,937.78 and 81,630.78 is: 112,660.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,246.78 : 194,937.78 = 81,630.78 : x
  2. Step 2: Convert to fraction form
    141,246.78/194,937.78 = 81,630.78/x
  3. Step 3: Cross multiply
    141,246.78x = 194,937.78 × 81,630.78
  4. Step 4: Simplify right side
    141,246.78x = 15,912,923,032.87
  5. Step 5: Solve for x
    x = 15,912,923,032.87/141,246.78
  6. Step 6: Final answer
    x = 112,660.43

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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.