Home / 80,905.80-121,358.70-51,454.20

Finding the Fourth Proportional to 80,905.80, 121,358.70 and 51,454.20

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Solution

The fourth proportional to 80,905.80, 121,358.70 and 51,454.20 is: 77,181.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,905.80 : 121,358.70 = 51,454.20 : x
  2. Step 2: Convert to fraction form
    80,905.80/121,358.70 = 51,454.20/x
  3. Step 3: Cross multiply
    80,905.80x = 121,358.70 × 51,454.20
  4. Step 4: Simplify right side
    80,905.80x = 6,244,414,821.54
  5. Step 5: Solve for x
    x = 6,244,414,821.54/80,905.80
  6. Step 6: Final answer
    x = 77,181.30

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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.