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Finding the Fourth Proportional to 69,121.80, 103,699.12 and 22,374.64

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Solution

The fourth proportional to 69,121.80, 103,699.12 and 22,374.64 is: 33,567.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,121.80 : 103,699.12 = 22,374.64 : x
  2. Step 2: Convert to fraction form
    69,121.80/103,699.12 = 22,374.64/x
  3. Step 3: Cross multiply
    69,121.80x = 103,699.12 × 22,374.64
  4. Step 4: Simplify right side
    69,121.80x = 2,320,230,478.32
  5. Step 5: Solve for x
    x = 2,320,230,478.32/69,121.80
  6. Step 6: Final answer
    x = 33,567.28

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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.