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Finding the Fourth Proportional to 111,939.37, 167,908.87 and 76,772.41

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Solution

The fourth proportional to 111,939.37, 167,908.87 and 76,772.41 is: 115,158.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,939.37 : 167,908.87 = 76,772.41 : x
  2. Step 2: Convert to fraction form
    111,939.37/167,908.87 = 76,772.41/x
  3. Step 3: Cross multiply
    111,939.37x = 167,908.87 × 76,772.41
  4. Step 4: Simplify right side
    111,939.37x = 12,890,768,610.28
  5. Step 5: Solve for x
    x = 12,890,768,610.28/111,939.37
  6. Step 6: Final answer
    x = 115,158.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.