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Finding the Fourth Proportional to 80,687.80, 120,743.70 and 51,119.80

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Solution

The fourth proportional to 80,687.80, 120,743.70 and 51,119.80 is: 76,497.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,687.80 : 120,743.70 = 51,119.80 : x
  2. Step 2: Convert to fraction form
    80,687.80/120,743.70 = 51,119.80/x
  3. Step 3: Cross multiply
    80,687.80x = 120,743.70 × 51,119.80
  4. Step 4: Simplify right side
    80,687.80x = 6,172,393,795.26
  5. Step 5: Solve for x
    x = 6,172,393,795.26/80,687.80
  6. Step 6: Final answer
    x = 76,497.24

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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.