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Finding the Fourth Proportional to 69,554, 104,351.16 and 20,306

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Solution

The fourth proportional to 69,554, 104,351.16 and 20,306 is: 30,464.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,554 : 104,351.16 = 20,306 : x
  2. Step 2: Convert to fraction form
    69,554/104,351.16 = 20,306/x
  3. Step 3: Cross multiply
    69,554x = 104,351.16 × 20,306
  4. Step 4: Simplify right side
    69,554x = 2,118,954,654.96
  5. Step 5: Solve for x
    x = 2,118,954,654.96/69,554
  6. Step 6: Final answer
    x = 30,464.89

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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.