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Finding the Fourth Proportional to 71,108.19, 106,662.42 and 18,517.59

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Solution

The fourth proportional to 71,108.19, 106,662.42 and 18,517.59 is: 27,776.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,108.19 : 106,662.42 = 18,517.59 : x
  2. Step 2: Convert to fraction form
    71,108.19/106,662.42 = 18,517.59/x
  3. Step 3: Cross multiply
    71,108.19x = 106,662.42 × 18,517.59
  4. Step 4: Simplify right side
    71,108.19x = 1,975,130,961.97
  5. Step 5: Solve for x
    x = 1,975,130,961.97/71,108.19
  6. Step 6: Final answer
    x = 27,776.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.