Home / 131,442.20-197,163.30-78,824.60

Finding the Fourth Proportional to 131,442.20, 197,163.30 and 78,824.60

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Solution

The fourth proportional to 131,442.20, 197,163.30 and 78,824.60 is: 118,236.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,442.20 : 197,163.30 = 78,824.60 : x
  2. Step 2: Convert to fraction form
    131,442.20/197,163.30 = 78,824.60/x
  3. Step 3: Cross multiply
    131,442.20x = 197,163.30 × 78,824.60
  4. Step 4: Simplify right side
    131,442.20x = 15,541,318,257.18
  5. Step 5: Solve for x
    x = 15,541,318,257.18/131,442.20
  6. Step 6: Final answer
    x = 118,236.90

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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.