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Finding the Fourth Proportional to 86,819.41, 129,873.85 and 65,601.73

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Solution

The fourth proportional to 86,819.41, 129,873.85 and 65,601.73 is: 98,134.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,819.41 : 129,873.85 = 65,601.73 : x
  2. Step 2: Convert to fraction form
    86,819.41/129,873.85 = 65,601.73/x
  3. Step 3: Cross multiply
    86,819.41x = 129,873.85 × 65,601.73
  4. Step 4: Simplify right side
    86,819.41x = 8,519,949,241.76
  5. Step 5: Solve for x
    x = 8,519,949,241.76/86,819.41
  6. Step 6: Final answer
    x = 98,134.15

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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.