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Finding the Fourth Proportional to 81,069, 121,604.04 and 25,665

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Solution

The fourth proportional to 81,069, 121,604.04 and 25,665 is: 38,497.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,069 : 121,604.04 = 25,665 : x
  2. Step 2: Convert to fraction form
    81,069/121,604.04 = 25,665/x
  3. Step 3: Cross multiply
    81,069x = 121,604.04 × 25,665
  4. Step 4: Simplify right side
    81,069x = 3,120,967,686.60
  5. Step 5: Solve for x
    x = 3,120,967,686.60/81,069
  6. Step 6: Final answer
    x = 38,497.67

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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.