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Finding the Fourth Proportional to 81,513.82, 122,245.46 and 39,367.72

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Solution

The fourth proportional to 81,513.82, 122,245.46 and 39,367.72 is: 59,039.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,513.82 : 122,245.46 = 39,367.72 : x
  2. Step 2: Convert to fraction form
    81,513.82/122,245.46 = 39,367.72/x
  3. Step 3: Cross multiply
    81,513.82x = 122,245.46 × 39,367.72
  4. Step 4: Simplify right side
    81,513.82x = 4,812,524,232.49
  5. Step 5: Solve for x
    x = 4,812,524,232.49/81,513.82
  6. Step 6: Final answer
    x = 59,039.37

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1.5x scale

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.