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Finding the Fourth Proportional to 133,287.30, 200,040.30 and 128,913.30

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Solution

The fourth proportional to 133,287.30, 200,040.30 and 128,913.30 is: 193,475.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,287.30 : 200,040.30 = 128,913.30 : x
  2. Step 2: Convert to fraction form
    133,287.30/200,040.30 = 128,913.30/x
  3. Step 3: Cross multiply
    133,287.30x = 200,040.30 × 128,913.30
  4. Step 4: Simplify right side
    133,287.30x = 25,787,855,205.99
  5. Step 5: Solve for x
    x = 25,787,855,205.99/133,287.30
  6. Step 6: Final answer
    x = 193,475.71

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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.