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Finding the Fourth Proportional to 84,620.20, 126,930.30 and 80,732.20

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Solution

The fourth proportional to 84,620.20, 126,930.30 and 80,732.20 is: 121,098.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,620.20 : 126,930.30 = 80,732.20 : x
  2. Step 2: Convert to fraction form
    84,620.20/126,930.30 = 80,732.20/x
  3. Step 3: Cross multiply
    84,620.20x = 126,930.30 × 80,732.20
  4. Step 4: Simplify right side
    84,620.20x = 10,247,362,365.66
  5. Step 5: Solve for x
    x = 10,247,362,365.66/84,620.20
  6. Step 6: Final answer
    x = 121,098.30

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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.