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Finding the Fourth Proportional to 207,512.10, 311,304.60 and 74,469.60

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Solution

The fourth proportional to 207,512.10, 311,304.60 and 74,469.60 is: 111,717.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,512.10 : 311,304.60 = 74,469.60 : x
  2. Step 2: Convert to fraction form
    207,512.10/311,304.60 = 74,469.60/x
  3. Step 3: Cross multiply
    207,512.10x = 311,304.60 × 74,469.60
  4. Step 4: Simplify right side
    207,512.10x = 23,182,729,040.16
  5. Step 5: Solve for x
    x = 23,182,729,040.16/207,512.10
  6. Step 6: Final answer
    x = 111,717.48

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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.