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Finding the Fourth Proportional to 121,755.01, 168,021.42 and 68,040.01

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Solution

The fourth proportional to 121,755.01, 168,021.42 and 68,040.01 is: 93,894.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,755.01 : 168,021.42 = 68,040.01 : x
  2. Step 2: Convert to fraction form
    121,755.01/168,021.42 = 68,040.01/x
  3. Step 3: Cross multiply
    121,755.01x = 168,021.42 × 68,040.01
  4. Step 4: Simplify right side
    121,755.01x = 11,432,179,097.01
  5. Step 5: Solve for x
    x = 11,432,179,097.01/121,755.01
  6. Step 6: Final answer
    x = 93,894.94

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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.