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Finding the Fourth Proportional to 69,323.64, 103,992.12 and 19,403.88

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Solution

The fourth proportional to 69,323.64, 103,992.12 and 19,403.88 is: 29,107.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,323.64 : 103,992.12 = 19,403.88 : x
  2. Step 2: Convert to fraction form
    69,323.64/103,992.12 = 19,403.88/x
  3. Step 3: Cross multiply
    69,323.64x = 103,992.12 × 19,403.88
  4. Step 4: Simplify right side
    69,323.64x = 2,017,850,617.43
  5. Step 5: Solve for x
    x = 2,017,850,617.43/69,323.64
  6. Step 6: Final answer
    x = 29,107.68

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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.