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Finding the Fourth Proportional to 147,934, 221,607.78 and 68,939.56

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Solution

The fourth proportional to 147,934, 221,607.78 and 68,939.56 is: 103,272.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,934 : 221,607.78 = 68,939.56 : x
  2. Step 2: Convert to fraction form
    147,934/221,607.78 = 68,939.56/x
  3. Step 3: Cross multiply
    147,934x = 221,607.78 × 68,939.56
  4. Step 4: Simplify right side
    147,934x = 15,277,542,845.78
  5. Step 5: Solve for x
    x = 15,277,542,845.78/147,934
  6. Step 6: Final answer
    x = 103,272.69

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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.