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Finding the Fourth Proportional to 121,858.74, 167,791.22 and 106,666.38

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Solution

The fourth proportional to 121,858.74, 167,791.22 and 106,666.38 is: 146,872.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,858.74 : 167,791.22 = 106,666.38 : x
  2. Step 2: Convert to fraction form
    121,858.74/167,791.22 = 106,666.38/x
  3. Step 3: Cross multiply
    121,858.74x = 167,791.22 × 106,666.38
  4. Step 4: Simplify right side
    121,858.74x = 17,897,682,033.18
  5. Step 5: Solve for x
    x = 17,897,682,033.18/121,858.74
  6. Step 6: Final answer
    x = 146,872.37

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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.