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Finding the Fourth Proportional to 207,400.60, 311,100.90 and 74,285.20

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Solution

The fourth proportional to 207,400.60, 311,100.90 and 74,285.20 is: 111,427.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,400.60 : 311,100.90 = 74,285.20 : x
  2. Step 2: Convert to fraction form
    207,400.60/311,100.90 = 74,285.20/x
  3. Step 3: Cross multiply
    207,400.60x = 311,100.90 × 74,285.20
  4. Step 4: Simplify right side
    207,400.60x = 23,110,192,576.68
  5. Step 5: Solve for x
    x = 23,110,192,576.68/207,400.60
  6. Step 6: Final answer
    x = 111,427.80

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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.