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Finding the Fourth Proportional to 79,279.71, 109,405.84 and 43,469.66

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Solution

The fourth proportional to 79,279.71, 109,405.84 and 43,469.66 is: 59,988.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,279.71 : 109,405.84 = 43,469.66 : x
  2. Step 2: Convert to fraction form
    79,279.71/109,405.84 = 43,469.66/x
  3. Step 3: Cross multiply
    79,279.71x = 109,405.84 × 43,469.66
  4. Step 4: Simplify right side
    79,279.71x = 4,755,834,913.16
  5. Step 5: Solve for x
    x = 4,755,834,913.16/79,279.71
  6. Step 6: Final answer
    x = 59,988.04

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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.