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Finding the Fourth Proportional to 69,369.98, 104,078.32 and 21,992.80

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Solution

The fourth proportional to 69,369.98, 104,078.32 and 21,992.80 is: 32,996.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,369.98 : 104,078.32 = 21,992.80 : x
  2. Step 2: Convert to fraction form
    69,369.98/104,078.32 = 21,992.80/x
  3. Step 3: Cross multiply
    69,369.98x = 104,078.32 × 21,992.80
  4. Step 4: Simplify right side
    69,369.98x = 2,288,973,676.10
  5. Step 5: Solve for x
    x = 2,288,973,676.10/69,369.98
  6. Step 6: Final answer
    x = 32,996.60

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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.