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Finding the Fourth Proportional to 86,139.55, 129,209.40 and 32,819.14

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Solution

The fourth proportional to 86,139.55, 129,209.40 and 32,819.14 is: 49,228.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,139.55 : 129,209.40 = 32,819.14 : x
  2. Step 2: Convert to fraction form
    86,139.55/129,209.40 = 32,819.14/x
  3. Step 3: Cross multiply
    86,139.55x = 129,209.40 × 32,819.14
  4. Step 4: Simplify right side
    86,139.55x = 4,240,541,387.92
  5. Step 5: Solve for x
    x = 4,240,541,387.92/86,139.55
  6. Step 6: Final answer
    x = 49,228.74

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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.