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Finding the Fourth Proportional to 201,912.38, 278,629.11 and 117,057.02

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Solution

The fourth proportional to 201,912.38, 278,629.11 and 117,057.02 is: 161,532.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,912.38 : 278,629.11 = 117,057.02 : x
  2. Step 2: Convert to fraction form
    201,912.38/278,629.11 = 117,057.02/x
  3. Step 3: Cross multiply
    201,912.38x = 278,629.11 × 117,057.02
  4. Step 4: Simplify right side
    201,912.38x = 32,615,493,301.85
  5. Step 5: Solve for x
    x = 32,615,493,301.85/201,912.38
  6. Step 6: Final answer
    x = 161,532.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.