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Finding the Fourth Proportional to 86,138.87, 129,184.95 and 54,501.41

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Solution

The fourth proportional to 86,138.87, 129,184.95 and 54,501.41 is: 81,737.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,138.87 : 129,184.95 = 54,501.41 : x
  2. Step 2: Convert to fraction form
    86,138.87/129,184.95 = 54,501.41/x
  3. Step 3: Cross multiply
    86,138.87x = 129,184.95 × 54,501.41
  4. Step 4: Simplify right side
    86,138.87x = 7,040,761,573.17
  5. Step 5: Solve for x
    x = 7,040,761,573.17/86,138.87
  6. Step 6: Final answer
    x = 81,737.34

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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.