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Finding the Fourth Proportional to 79,279.89, 109,405.45 and 43,469.82

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Solution

The fourth proportional to 79,279.89, 109,405.45 and 43,469.82 is: 59,987.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,279.89 : 109,405.45 = 43,469.82 : x
  2. Step 2: Convert to fraction form
    79,279.89/109,405.45 = 43,469.82/x
  3. Step 3: Cross multiply
    79,279.89x = 109,405.45 × 43,469.82
  4. Step 4: Simplify right side
    79,279.89x = 4,755,835,272.86
  5. Step 5: Solve for x
    x = 4,755,835,272.86/79,279.89
  6. Step 6: Final answer
    x = 59,987.92

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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.