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Finding the Fourth Proportional to 221,042.32, 331,628.16 and 71,279.59

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Solution

The fourth proportional to 221,042.32, 331,628.16 and 71,279.59 is: 106,940.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,042.32 : 331,628.16 = 71,279.59 : x
  2. Step 2: Convert to fraction form
    221,042.32/331,628.16 = 71,279.59/x
  3. Step 3: Cross multiply
    221,042.32x = 331,628.16 × 71,279.59
  4. Step 4: Simplify right side
    221,042.32x = 23,638,319,277.25
  5. Step 5: Solve for x
    x = 23,638,319,277.25/221,042.32
  6. Step 6: Final answer
    x = 106,940.24

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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.