Home / 81,964.20-122,946.30-40,405.80

Finding the Fourth Proportional to 81,964.20, 122,946.30 and 40,405.80

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Solution

The fourth proportional to 81,964.20, 122,946.30 and 40,405.80 is: 60,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,964.20 : 122,946.30 = 40,405.80 : x
  2. Step 2: Convert to fraction form
    81,964.20/122,946.30 = 40,405.80/x
  3. Step 3: Cross multiply
    81,964.20x = 122,946.30 × 40,405.80
  4. Step 4: Simplify right side
    81,964.20x = 4,967,743,608.54
  5. Step 5: Solve for x
    x = 4,967,743,608.54/81,964.20
  6. Step 6: Final answer
    x = 60,608.70

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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.