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Finding the Fourth Proportional to 84,179.68, 125,579.56 and 81,891.52

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Solution

The fourth proportional to 84,179.68, 125,579.56 and 81,891.52 is: 122,166.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,179.68 : 125,579.56 = 81,891.52 : x
  2. Step 2: Convert to fraction form
    84,179.68/125,579.56 = 81,891.52/x
  3. Step 3: Cross multiply
    84,179.68x = 125,579.56 × 81,891.52
  4. Step 4: Simplify right side
    84,179.68x = 10,283,901,049.33
  5. Step 5: Solve for x
    x = 10,283,901,049.33/84,179.68
  6. Step 6: Final answer
    x = 122,166.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.