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Finding the Fourth Proportional to 225,287.87, 310,896.43 and 121,921.85

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Solution

The fourth proportional to 225,287.87, 310,896.43 and 121,921.85 is: 168,251.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,287.87 : 310,896.43 = 121,921.85 : x
  2. Step 2: Convert to fraction form
    225,287.87/310,896.43 = 121,921.85/x
  3. Step 3: Cross multiply
    225,287.87x = 310,896.43 × 121,921.85
  4. Step 4: Simplify right side
    225,287.87x = 37,905,067,904.00
  5. Step 5: Solve for x
    x = 37,905,067,904.00/225,287.87
  6. Step 6: Final answer
    x = 168,251.70

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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.