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Finding the Fourth Proportional to 81,766.99, 122,689.21 and 34,392.45

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Solution

The fourth proportional to 81,766.99, 122,689.21 and 34,392.45 is: 51,604.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,766.99 : 122,689.21 = 34,392.45 : x
  2. Step 2: Convert to fraction form
    81,766.99/122,689.21 = 34,392.45/x
  3. Step 3: Cross multiply
    81,766.99x = 122,689.21 × 34,392.45
  4. Step 4: Simplify right side
    81,766.99x = 4,219,582,520.46
  5. Step 5: Solve for x
    x = 4,219,582,520.46/81,766.99
  6. Step 6: Final answer
    x = 51,604.96

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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.