Home / 207,964.90-311,946.33-81,515.80

Finding the Fourth Proportional to 207,964.90, 311,946.33 and 81,515.80

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Solution

The fourth proportional to 207,964.90, 311,946.33 and 81,515.80 is: 122,273.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,964.90 : 311,946.33 = 81,515.80 : x
  2. Step 2: Convert to fraction form
    207,964.90/311,946.33 = 81,515.80/x
  3. Step 3: Cross multiply
    207,964.90x = 311,946.33 × 81,515.80
  4. Step 4: Simplify right side
    207,964.90x = 25,428,554,647.01
  5. Step 5: Solve for x
    x = 25,428,554,647.01/207,964.90
  6. Step 6: Final answer
    x = 122,273.30

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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.