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Finding the Fourth Proportional to 200,551.72, 300,831.90 and 67,436.20

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Solution

The fourth proportional to 200,551.72, 300,831.90 and 67,436.20 is: 101,155.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,551.72 : 300,831.90 = 67,436.20 : x
  2. Step 2: Convert to fraction form
    200,551.72/300,831.90 = 67,436.20/x
  3. Step 3: Cross multiply
    200,551.72x = 300,831.90 × 67,436.20
  4. Step 4: Simplify right side
    200,551.72x = 20,286,960,174.78
  5. Step 5: Solve for x
    x = 20,286,960,174.78/200,551.72
  6. Step 6: Final answer
    x = 101,155.75

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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.