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Finding the Fourth Proportional to 225,918.72, 338,768.60 and 68,117.76

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Solution

The fourth proportional to 225,918.72, 338,768.60 and 68,117.76 is: 102,143.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,918.72 : 338,768.60 = 68,117.76 : x
  2. Step 2: Convert to fraction form
    225,918.72/338,768.60 = 68,117.76/x
  3. Step 3: Cross multiply
    225,918.72x = 338,768.60 × 68,117.76
  4. Step 4: Simplify right side
    225,918.72x = 23,076,158,190.34
  5. Step 5: Solve for x
    x = 23,076,158,190.34/225,918.72
  6. Step 6: Final answer
    x = 102,143.63

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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.