Home / 131,454.20-197,181.30-81,371.90

Finding the Fourth Proportional to 131,454.20, 197,181.30 and 81,371.90

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Solution

The fourth proportional to 131,454.20, 197,181.30 and 81,371.90 is: 122,057.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,454.20 : 197,181.30 = 81,371.90 : x
  2. Step 2: Convert to fraction form
    131,454.20/197,181.30 = 81,371.90/x
  3. Step 3: Cross multiply
    131,454.20x = 197,181.30 × 81,371.90
  4. Step 4: Simplify right side
    131,454.20x = 16,045,017,025.47
  5. Step 5: Solve for x
    x = 16,045,017,025.47/131,454.20
  6. Step 6: Final answer
    x = 122,057.85

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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.