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Finding the Fourth Proportional to 86,512.87, 129,758.10 and 27,354.52

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Solution

The fourth proportional to 86,512.87, 129,758.10 and 27,354.52 is: 41,028.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,512.87 : 129,758.10 = 27,354.52 : x
  2. Step 2: Convert to fraction form
    86,512.87/129,758.10 = 27,354.52/x
  3. Step 3: Cross multiply
    86,512.87x = 129,758.10 × 27,354.52
  4. Step 4: Simplify right side
    86,512.87x = 3,549,470,541.61
  5. Step 5: Solve for x
    x = 3,549,470,541.61/86,512.87
  6. Step 6: Final answer
    x = 41,028.24

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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.