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Finding the Fourth Proportional to 207,906.10, 311,859.15 and 74,790.70

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Solution

The fourth proportional to 207,906.10, 311,859.15 and 74,790.70 is: 112,186.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,906.10 : 311,859.15 = 74,790.70 : x
  2. Step 2: Convert to fraction form
    207,906.10/311,859.15 = 74,790.70/x
  3. Step 3: Cross multiply
    207,906.10x = 311,859.15 × 74,790.70
  4. Step 4: Simplify right side
    207,906.10x = 23,324,164,129.91
  5. Step 5: Solve for x
    x = 23,324,164,129.91/207,906.10
  6. Step 6: Final answer
    x = 112,186.05

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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.