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Finding the Fourth Proportional to 185,644.71, 278,422.43 and 85,708.89

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Solution

The fourth proportional to 185,644.71, 278,422.43 and 85,708.89 is: 128,542.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,644.71 : 278,422.43 = 85,708.89 : x
  2. Step 2: Convert to fraction form
    185,644.71/278,422.43 = 85,708.89/x
  3. Step 3: Cross multiply
    185,644.71x = 278,422.43 × 85,708.89
  4. Step 4: Simplify right side
    185,644.71x = 23,863,276,997.86
  5. Step 5: Solve for x
    x = 23,863,276,997.86/185,644.71
  6. Step 6: Final answer
    x = 128,542.73

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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.