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Finding the Fourth Proportional to 243,340.38, 335,806.16 and 135,911.90

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Solution

The fourth proportional to 243,340.38, 335,806.16 and 135,911.90 is: 187,556.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,340.38 : 335,806.16 = 135,911.90 : x
  2. Step 2: Convert to fraction form
    243,340.38/335,806.16 = 135,911.90/x
  3. Step 3: Cross multiply
    243,340.38x = 335,806.16 × 135,911.90
  4. Step 4: Simplify right side
    243,340.38x = 45,640,053,397.26
  5. Step 5: Solve for x
    x = 45,640,053,397.26/243,340.38
  6. Step 6: Final answer
    x = 187,556.43

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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.