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Finding the Fourth Proportional to 202,121.80, 303,838.80 and 143,364.40

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Solution

The fourth proportional to 202,121.80, 303,838.80 and 143,364.40 is: 215,511.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,121.80 : 303,838.80 = 143,364.40 : x
  2. Step 2: Convert to fraction form
    202,121.80/303,838.80 = 143,364.40/x
  3. Step 3: Cross multiply
    202,121.80x = 303,838.80 × 143,364.40
  4. Step 4: Simplify right side
    202,121.80x = 43,559,667,258.72
  5. Step 5: Solve for x
    x = 43,559,667,258.72/202,121.80
  6. Step 6: Final answer
    x = 215,511.97

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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.