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Finding the Fourth Proportional to 221,273.64, 331,952.58 and 81,039.96

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Solution

The fourth proportional to 221,273.64, 331,952.58 and 81,039.96 is: 121,575.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,273.64 : 331,952.58 = 81,039.96 : x
  2. Step 2: Convert to fraction form
    221,273.64/331,952.58 = 81,039.96/x
  3. Step 3: Cross multiply
    221,273.64x = 331,952.58 × 81,039.96
  4. Step 4: Simplify right side
    221,273.64x = 26,901,423,805.10
  5. Step 5: Solve for x
    x = 26,901,423,805.10/221,273.64
  6. Step 6: Final answer
    x = 121,575.37

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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.