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Finding the Fourth Proportional to 86,356.88, 129,539.94 and 27,197.16

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Solution

The fourth proportional to 86,356.88, 129,539.94 and 27,197.16 is: 40,797.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,356.88 : 129,539.94 = 27,197.16 : x
  2. Step 2: Convert to fraction form
    86,356.88/129,539.94 = 27,197.16/x
  3. Step 3: Cross multiply
    86,356.88x = 129,539.94 × 27,197.16
  4. Step 4: Simplify right side
    86,356.88x = 3,523,117,826.87
  5. Step 5: Solve for x
    x = 3,523,117,826.87/86,356.88
  6. Step 6: Final answer
    x = 40,797.19

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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.