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Finding the Fourth Proportional to 172,297.78, 237,736.09 and 100,663.96

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Solution

The fourth proportional to 172,297.78, 237,736.09 and 100,663.96 is: 138,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,297.78 : 237,736.09 = 100,663.96 : x
  2. Step 2: Convert to fraction form
    172,297.78/237,736.09 = 100,663.96/x
  3. Step 3: Cross multiply
    172,297.78x = 237,736.09 × 100,663.96
  4. Step 4: Simplify right side
    172,297.78x = 23,931,454,562.32
  5. Step 5: Solve for x
    x = 23,931,454,562.32/172,297.78
  6. Step 6: Final answer
    x = 138,895.90

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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.