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Finding the Fourth Proportional to 201,992.88, 278,717.58 and 121,401.12

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Solution

The fourth proportional to 201,992.88, 278,717.58 and 121,401.12 is: 167,513.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,992.88 : 278,717.58 = 121,401.12 : x
  2. Step 2: Convert to fraction form
    201,992.88/278,717.58 = 121,401.12/x
  3. Step 3: Cross multiply
    201,992.88x = 278,717.58 × 121,401.12
  4. Step 4: Simplify right side
    201,992.88x = 33,836,626,375.69
  5. Step 5: Solve for x
    x = 33,836,626,375.69/201,992.88
  6. Step 6: Final answer
    x = 167,513.96

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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.