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Finding the Fourth Proportional to 243,078.39, 335,408.07 and 135,648.17

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Solution

The fourth proportional to 243,078.39, 335,408.07 and 135,648.17 is: 187,172.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,078.39 : 335,408.07 = 135,648.17 : x
  2. Step 2: Convert to fraction form
    243,078.39/335,408.07 = 135,648.17/x
  3. Step 3: Cross multiply
    243,078.39x = 335,408.07 × 135,648.17
  4. Step 4: Simplify right side
    243,078.39x = 45,497,489,843.62
  5. Step 5: Solve for x
    x = 45,497,489,843.62/243,078.39
  6. Step 6: Final answer
    x = 187,172.09

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1.5x scale

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.