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Finding the Fourth Proportional to 86,578.97, 129,909.57 and 59,965.91

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Solution

The fourth proportional to 86,578.97, 129,909.57 and 59,965.91 is: 89,977.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,578.97 : 129,909.57 = 59,965.91 : x
  2. Step 2: Convert to fraction form
    86,578.97/129,909.57 = 59,965.91/x
  3. Step 3: Cross multiply
    86,578.97x = 129,909.57 × 59,965.91
  4. Step 4: Simplify right side
    86,578.97x = 7,790,144,933.21
  5. Step 5: Solve for x
    x = 7,790,144,933.21/86,578.97
  6. Step 6: Final answer
    x = 89,977.34

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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.