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Finding the Fourth Proportional to 203,920.45, 305,880.68 and 133,061.65

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Solution

The fourth proportional to 203,920.45, 305,880.68 and 133,061.65 is: 199,592.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,920.45 : 305,880.68 = 133,061.65 : x
  2. Step 2: Convert to fraction form
    203,920.45/305,880.68 = 133,061.65/x
  3. Step 3: Cross multiply
    203,920.45x = 305,880.68 × 133,061.65
  4. Step 4: Simplify right side
    203,920.45x = 40,700,987,983.92
  5. Step 5: Solve for x
    x = 40,700,987,983.92/203,920.45
  6. Step 6: Final answer
    x = 199,592.48

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1.5x scale

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.