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Finding the Fourth Proportional to 79,079, 109,128 and 43,268.48

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Solution

The fourth proportional to 79,079, 109,128 and 43,268.48 is: 59,709.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,079 : 109,128 = 43,268.48 : x
  2. Step 2: Convert to fraction form
    79,079/109,128 = 43,268.48/x
  3. Step 3: Cross multiply
    79,079x = 109,128 × 43,268.48
  4. Step 4: Simplify right side
    79,079x = 4,721,802,685.44
  5. Step 5: Solve for x
    x = 4,721,802,685.44/79,079
  6. Step 6: Final answer
    x = 59,709.94

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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.