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Finding the Fourth Proportional to 80,694.54, 120,782.94 and 43,160.76

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Solution

The fourth proportional to 80,694.54, 120,782.94 and 43,160.76 is: 64,602.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,694.54 : 120,782.94 = 43,160.76 : x
  2. Step 2: Convert to fraction form
    80,694.54/120,782.94 = 43,160.76/x
  3. Step 3: Cross multiply
    80,694.54x = 120,782.94 × 43,160.76
  4. Step 4: Simplify right side
    80,694.54x = 5,213,083,485.43
  5. Step 5: Solve for x
    x = 5,213,083,485.43/80,694.54
  6. Step 6: Final answer
    x = 64,602.68

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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.