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Finding the Fourth Proportional to 71,209.80, 106,805.42 and 18,623.34

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Solution

The fourth proportional to 71,209.80, 106,805.42 and 18,623.34 is: 27,932.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,209.80 : 106,805.42 = 18,623.34 : x
  2. Step 2: Convert to fraction form
    71,209.80/106,805.42 = 18,623.34/x
  3. Step 3: Cross multiply
    71,209.80x = 106,805.42 × 18,623.34
  4. Step 4: Simplify right side
    71,209.80x = 1,989,073,650.50
  5. Step 5: Solve for x
    x = 1,989,073,650.50/71,209.80
  6. Step 6: Final answer
    x = 27,932.58

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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.