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Finding the Fourth Proportional to 79,689.72, 109,974.54 and 43,882.20

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Solution

The fourth proportional to 79,689.72, 109,974.54 and 43,882.20 is: 60,558.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.72 : 109,974.54 = 43,882.20 : x
  2. Step 2: Convert to fraction form
    79,689.72/109,974.54 = 43,882.20/x
  3. Step 3: Cross multiply
    79,689.72x = 109,974.54 × 43,882.20
  4. Step 4: Simplify right side
    79,689.72x = 4,825,924,759.19
  5. Step 5: Solve for x
    x = 4,825,924,759.19/79,689.72
  6. Step 6: Final answer
    x = 60,558.94

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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.