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Finding the Fourth Proportional to 80,676.10, 121,014.15 and 28,048.60

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Solution

The fourth proportional to 80,676.10, 121,014.15 and 28,048.60 is: 42,072.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,676.10 : 121,014.15 = 28,048.60 : x
  2. Step 2: Convert to fraction form
    80,676.10/121,014.15 = 28,048.60/x
  3. Step 3: Cross multiply
    80,676.10x = 121,014.15 × 28,048.60
  4. Step 4: Simplify right side
    80,676.10x = 3,394,277,487.69
  5. Step 5: Solve for x
    x = 3,394,277,487.69/80,676.10
  6. Step 6: Final answer
    x = 42,072.90

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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.