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Finding the Fourth Proportional to 81,794.63, 122,691.98 and 25,639.11

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Solution

The fourth proportional to 81,794.63, 122,691.98 and 25,639.11 is: 38,458.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,794.63 : 122,691.98 = 25,639.11 : x
  2. Step 2: Convert to fraction form
    81,794.63/122,691.98 = 25,639.11/x
  3. Step 3: Cross multiply
    81,794.63x = 122,691.98 × 25,639.11
  4. Step 4: Simplify right side
    81,794.63x = 3,145,713,171.34
  5. Step 5: Solve for x
    x = 3,145,713,171.34/81,794.63
  6. Step 6: Final answer
    x = 38,458.68

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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.