Home / 207,921.09-311,915.22-81,492.73

Finding the Fourth Proportional to 207,921.09, 311,915.22 and 81,492.73

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Solution

The fourth proportional to 207,921.09, 311,915.22 and 81,492.73 is: 122,252.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,921.09 : 311,915.22 = 81,492.73 : x
  2. Step 2: Convert to fraction form
    207,921.09/311,915.22 = 81,492.73/x
  3. Step 3: Cross multiply
    207,921.09x = 311,915.22 × 81,492.73
  4. Step 4: Simplify right side
    207,921.09x = 25,418,822,806.35
  5. Step 5: Solve for x
    x = 25,418,822,806.35/207,921.09
  6. Step 6: Final answer
    x = 122,252.26

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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.