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Finding the Fourth Proportional to 79,666.38, 109,939.01 and 43,857

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Solution

The fourth proportional to 79,666.38, 109,939.01 and 43,857 is: 60,522.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,666.38 : 109,939.01 = 43,857 : x
  2. Step 2: Convert to fraction form
    79,666.38/109,939.01 = 43,857/x
  3. Step 3: Cross multiply
    79,666.38x = 109,939.01 × 43,857
  4. Step 4: Simplify right side
    79,666.38x = 4,821,594,942.29
  5. Step 5: Solve for x
    x = 4,821,594,942.29/79,666.38
  6. Step 6: Final answer
    x = 60,522.33

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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.