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Finding the Fourth Proportional to 202,121.20, 303,431.40 and 127,241.20

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Solution

The fourth proportional to 202,121.20, 303,431.40 and 127,241.20 is: 191,018.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,121.20 : 303,431.40 = 127,241.20 : x
  2. Step 2: Convert to fraction form
    202,121.20/303,431.40 = 127,241.20/x
  3. Step 3: Cross multiply
    202,121.20x = 303,431.40 × 127,241.20
  4. Step 4: Simplify right side
    202,121.20x = 38,608,975,453.68
  5. Step 5: Solve for x
    x = 38,608,975,453.68/202,121.20
  6. Step 6: Final answer
    x = 191,018.93

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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.