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Finding the Fourth Proportional to 79,576, 109,815.79 and 43,766.60

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Solution

The fourth proportional to 79,576, 109,815.79 and 43,766.60 is: 60,398.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,576 : 109,815.79 = 43,766.60 : x
  2. Step 2: Convert to fraction form
    79,576/109,815.79 = 43,766.60/x
  3. Step 3: Cross multiply
    79,576x = 109,815.79 × 43,766.60
  4. Step 4: Simplify right side
    79,576x = 4,806,263,754.61
  5. Step 5: Solve for x
    x = 4,806,263,754.61/79,576
  6. Step 6: Final answer
    x = 60,398.41

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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.