Home / 149,141.79-205,819.99-81,163.15

Finding the Fourth Proportional to 149,141.79, 205,819.99 and 81,163.15

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Solution

The fourth proportional to 149,141.79, 205,819.99 and 81,163.15 is: 112,007.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,141.79 : 205,819.99 = 81,163.15 : x
  2. Step 2: Convert to fraction form
    149,141.79/205,819.99 = 81,163.15/x
  3. Step 3: Cross multiply
    149,141.79x = 205,819.99 × 81,163.15
  4. Step 4: Simplify right side
    149,141.79x = 16,704,998,083.37
  5. Step 5: Solve for x
    x = 16,704,998,083.37/149,141.79
  6. Step 6: Final answer
    x = 112,007.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.