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Finding the Fourth Proportional to 185,514.70, 278,425.65 and 85,828.30

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Solution

The fourth proportional to 185,514.70, 278,425.65 and 85,828.30 is: 128,813.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,514.70 : 278,425.65 = 85,828.30 : x
  2. Step 2: Convert to fraction form
    185,514.70/278,425.65 = 85,828.30/x
  3. Step 3: Cross multiply
    185,514.70x = 278,425.65 × 85,828.30
  4. Step 4: Simplify right side
    185,514.70x = 23,896,800,215.90
  5. Step 5: Solve for x
    x = 23,896,800,215.90/185,514.70
  6. Step 6: Final answer
    x = 128,813.51

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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.