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Finding the Fourth Proportional to 167,436, 231,061.78 and 91,989.36

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Solution

The fourth proportional to 167,436, 231,061.78 and 91,989.36 is: 126,945.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,436 : 231,061.78 = 91,989.36 : x
  2. Step 2: Convert to fraction form
    167,436/231,061.78 = 91,989.36/x
  3. Step 3: Cross multiply
    167,436x = 231,061.78 × 91,989.36
  4. Step 4: Simplify right side
    167,436x = 21,255,225,262.66
  5. Step 5: Solve for x
    x = 21,255,225,262.66/167,436
  6. Step 6: Final answer
    x = 126,945.37

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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.