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Finding the Fourth Proportional to 86,410.80, 129,616.22 and 27,251.10

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Solution

The fourth proportional to 86,410.80, 129,616.22 and 27,251.10 is: 40,876.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,410.80 : 129,616.22 = 27,251.10 : x
  2. Step 2: Convert to fraction form
    86,410.80/129,616.22 = 27,251.10/x
  3. Step 3: Cross multiply
    86,410.80x = 129,616.22 × 27,251.10
  4. Step 4: Simplify right side
    86,410.80x = 3,532,184,436.59
  5. Step 5: Solve for x
    x = 3,532,184,436.59/86,410.80
  6. Step 6: Final answer
    x = 40,876.65

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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.