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Finding the Fourth Proportional to 78,481.44, 108,335.76 and 48,279.04

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Solution

The fourth proportional to 78,481.44, 108,335.76 and 48,279.04 is: 66,644.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,481.44 : 108,335.76 = 48,279.04 : x
  2. Step 2: Convert to fraction form
    78,481.44/108,335.76 = 48,279.04/x
  3. Step 3: Cross multiply
    78,481.44x = 108,335.76 × 48,279.04
  4. Step 4: Simplify right side
    78,481.44x = 5,230,346,490.47
  5. Step 5: Solve for x
    x = 5,230,346,490.47/78,481.44
  6. Step 6: Final answer
    x = 66,644.37

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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.