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Finding the Fourth Proportional to 79,311, 109,449.18 and 43,983

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Solution

The fourth proportional to 79,311, 109,449.18 and 43,983 is: 60,696.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,311 : 109,449.18 = 43,983 : x
  2. Step 2: Convert to fraction form
    79,311/109,449.18 = 43,983/x
  3. Step 3: Cross multiply
    79,311x = 109,449.18 × 43,983
  4. Step 4: Simplify right side
    79,311x = 4,813,903,283.94
  5. Step 5: Solve for x
    x = 4,813,903,283.94/79,311
  6. Step 6: Final answer
    x = 60,696.54

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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.