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Finding the Fourth Proportional to 172,356.72, 237,772.44 and 100,739.76

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Solution

The fourth proportional to 172,356.72, 237,772.44 and 100,739.76 is: 138,974.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,356.72 : 237,772.44 = 100,739.76 : x
  2. Step 2: Convert to fraction form
    172,356.72/237,772.44 = 100,739.76/x
  3. Step 3: Cross multiply
    172,356.72x = 237,772.44 × 100,739.76
  4. Step 4: Simplify right side
    172,356.72x = 23,953,138,540.21
  5. Step 5: Solve for x
    x = 23,953,138,540.21/172,356.72
  6. Step 6: Final answer
    x = 138,974.21

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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.