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Finding the Fourth Proportional to 207,960.60, 311,940.90 and 74,845.20

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Solution

The fourth proportional to 207,960.60, 311,940.90 and 74,845.20 is: 112,267.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,960.60 : 311,940.90 = 74,845.20 : x
  2. Step 2: Convert to fraction form
    207,960.60/311,940.90 = 74,845.20/x
  3. Step 3: Cross multiply
    207,960.60x = 311,940.90 × 74,845.20
  4. Step 4: Simplify right side
    207,960.60x = 23,347,279,048.68
  5. Step 5: Solve for x
    x = 23,347,279,048.68/207,960.60
  6. Step 6: Final answer
    x = 112,267.80

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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.