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Finding the Fourth Proportional to 207,563.56, 311,389.08 and 67,311.28

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Solution

The fourth proportional to 207,563.56, 311,389.08 and 67,311.28 is: 100,981.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,563.56 : 311,389.08 = 67,311.28 : x
  2. Step 2: Convert to fraction form
    207,563.56/311,389.08 = 67,311.28/x
  3. Step 3: Cross multiply
    207,563.56x = 311,389.08 × 67,311.28
  4. Step 4: Simplify right side
    207,563.56x = 20,959,997,552.82
  5. Step 5: Solve for x
    x = 20,959,997,552.82/207,563.56
  6. Step 6: Final answer
    x = 100,981.10

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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.