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Finding the Fourth Proportional to 221,371.92, 331,860.64 and 81,097.74

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Solution

The fourth proportional to 221,371.92, 331,860.64 and 81,097.74 is: 121,574.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,371.92 : 331,860.64 = 81,097.74 : x
  2. Step 2: Convert to fraction form
    221,371.92/331,860.64 = 81,097.74/x
  3. Step 3: Cross multiply
    221,371.92x = 331,860.64 × 81,097.74
  4. Step 4: Simplify right side
    221,371.92x = 26,913,147,898.95
  5. Step 5: Solve for x
    x = 26,913,147,898.95/221,371.92
  6. Step 6: Final answer
    x = 121,574.35

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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.