Home / 81,774.20-122,661.30-25,614.78

Finding the Fourth Proportional to 81,774.20, 122,661.30 and 25,614.78

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Solution

The fourth proportional to 81,774.20, 122,661.30 and 25,614.78 is: 38,422.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,774.20 : 122,661.30 = 25,614.78 : x
  2. Step 2: Convert to fraction form
    81,774.20/122,661.30 = 25,614.78/x
  3. Step 3: Cross multiply
    81,774.20x = 122,661.30 × 25,614.78
  4. Step 4: Simplify right side
    81,774.20x = 3,141,942,214.01
  5. Step 5: Solve for x
    x = 3,141,942,214.01/81,774.20
  6. Step 6: Final answer
    x = 38,422.17

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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.