Home / 207,981.36-311,743.62-81,583.56

Finding the Fourth Proportional to 207,981.36, 311,743.62 and 81,583.56

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Solution

The fourth proportional to 207,981.36, 311,743.62 and 81,583.56 is: 122,285.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,981.36 : 311,743.62 = 81,583.56 : x
  2. Step 2: Convert to fraction form
    207,981.36/311,743.62 = 81,583.56/x
  3. Step 3: Cross multiply
    207,981.36x = 311,743.62 × 81,583.56
  4. Step 4: Simplify right side
    207,981.36x = 25,433,154,326.89
  5. Step 5: Solve for x
    x = 25,433,154,326.89/207,981.36
  6. Step 6: Final answer
    x = 122,285.74

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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.