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Finding the Fourth Proportional to 85,864.92, 128,782.56 and 22,685.73

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Solution

The fourth proportional to 85,864.92, 128,782.56 and 22,685.73 is: 34,024.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,864.92 : 128,782.56 = 22,685.73 : x
  2. Step 2: Convert to fraction form
    85,864.92/128,782.56 = 22,685.73/x
  3. Step 3: Cross multiply
    85,864.92x = 128,782.56 × 22,685.73
  4. Step 4: Simplify right side
    85,864.92x = 2,921,526,384.87
  5. Step 5: Solve for x
    x = 2,921,526,384.87/85,864.92
  6. Step 6: Final answer
    x = 34,024.68

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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.