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Finding the Fourth Proportional to 79,122, 109,188.36 and 43,794

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Solution

The fourth proportional to 79,122, 109,188.36 and 43,794 is: 60,435.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,122 : 109,188.36 = 43,794 : x
  2. Step 2: Convert to fraction form
    79,122/109,188.36 = 43,794/x
  3. Step 3: Cross multiply
    79,122x = 109,188.36 × 43,794
  4. Step 4: Simplify right side
    79,122x = 4,781,795,037.84
  5. Step 5: Solve for x
    x = 4,781,795,037.84/79,122
  6. Step 6: Final answer
    x = 60,435.72

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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.