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Finding the Fourth Proportional to 86,596.20, 129,894.30 and 39,940.20

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Solution

The fourth proportional to 86,596.20, 129,894.30 and 39,940.20 is: 59,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,596.20 : 129,894.30 = 39,940.20 : x
  2. Step 2: Convert to fraction form
    86,596.20/129,894.30 = 39,940.20/x
  3. Step 3: Cross multiply
    86,596.20x = 129,894.30 × 39,940.20
  4. Step 4: Simplify right side
    86,596.20x = 5,188,004,320.86
  5. Step 5: Solve for x
    x = 5,188,004,320.86/86,596.20
  6. Step 6: Final answer
    x = 59,910.30

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Similar ratio
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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.