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Finding the Fourth Proportional to 80,798.80, 120,910.20 and 51,230.80

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Solution

The fourth proportional to 80,798.80, 120,910.20 and 51,230.80 is: 76,663.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,798.80 : 120,910.20 = 51,230.80 : x
  2. Step 2: Convert to fraction form
    80,798.80/120,910.20 = 51,230.80/x
  3. Step 3: Cross multiply
    80,798.80x = 120,910.20 × 51,230.80
  4. Step 4: Simplify right side
    80,798.80x = 6,194,326,274.16
  5. Step 5: Solve for x
    x = 6,194,326,274.16/80,798.80
  6. Step 6: Final answer
    x = 76,663.59

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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.