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Finding the Fourth Proportional to 128,025.52, 191,781.06 and 63,789.91

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Solution

The fourth proportional to 128,025.52, 191,781.06 and 63,789.91 is: 95,556.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,025.52 : 191,781.06 = 63,789.91 : x
  2. Step 2: Convert to fraction form
    128,025.52/191,781.06 = 63,789.91/x
  3. Step 3: Cross multiply
    128,025.52x = 191,781.06 × 63,789.91
  4. Step 4: Simplify right side
    128,025.52x = 12,233,696,557.10
  5. Step 5: Solve for x
    x = 12,233,696,557.10/128,025.52
  6. Step 6: Final answer
    x = 95,556.70

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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.