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Finding the Fourth Proportional to 207,412.64, 311,115.36 and 67,171.52

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Solution

The fourth proportional to 207,412.64, 311,115.36 and 67,171.52 is: 100,756.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,412.64 : 311,115.36 = 67,171.52 : x
  2. Step 2: Convert to fraction form
    207,412.64/311,115.36 = 67,171.52/x
  3. Step 3: Cross multiply
    207,412.64x = 311,115.36 × 67,171.52
  4. Step 4: Simplify right side
    207,412.64x = 20,898,091,626.55
  5. Step 5: Solve for x
    x = 20,898,091,626.55/207,412.64
  6. Step 6: Final answer
    x = 100,756.11

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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.