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Finding the Fourth Proportional to 221,344.67, 331,819.76 and 81,070.49

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Solution

The fourth proportional to 221,344.67, 331,819.76 and 81,070.49 is: 121,533.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,344.67 : 331,819.76 = 81,070.49 : x
  2. Step 2: Convert to fraction form
    221,344.67/331,819.76 = 81,070.49/x
  3. Step 3: Cross multiply
    221,344.67x = 331,819.76 × 81,070.49
  4. Step 4: Simplify right side
    221,344.67x = 26,900,788,470.43
  5. Step 5: Solve for x
    x = 26,900,788,470.43/221,344.67
  6. Step 6: Final answer
    x = 121,533.48

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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.