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Finding the Fourth Proportional to 80,620.58, 120,930.48 and 20,648.94

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Solution

The fourth proportional to 80,620.58, 120,930.48 and 20,648.94 is: 30,973.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,620.58 : 120,930.48 = 20,648.94 : x
  2. Step 2: Convert to fraction form
    80,620.58/120,930.48 = 20,648.94/x
  3. Step 3: Cross multiply
    80,620.58x = 120,930.48 × 20,648.94
  4. Step 4: Simplify right side
    80,620.58x = 2,497,086,225.69
  5. Step 5: Solve for x
    x = 2,497,086,225.69/80,620.58
  6. Step 6: Final answer
    x = 30,973.31

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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.