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Finding the Fourth Proportional to 207,395.93, 311,143.10 and 67,154.55

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Solution

The fourth proportional to 207,395.93, 311,143.10 and 67,154.55 is: 100,747.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,395.93 : 311,143.10 = 67,154.55 : x
  2. Step 2: Convert to fraction form
    207,395.93/311,143.10 = 67,154.55/x
  3. Step 3: Cross multiply
    207,395.93x = 311,143.10 × 67,154.55
  4. Step 4: Simplify right side
    207,395.93x = 20,894,674,530.33
  5. Step 5: Solve for x
    x = 20,894,674,530.33/207,395.93
  6. Step 6: Final answer
    x = 100,747.76

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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.