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Finding the Fourth Proportional to 171,351.78, 256,875.09 and 81,338.96

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Solution

The fourth proportional to 171,351.78, 256,875.09 and 81,338.96 is: 121,936.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,351.78 : 256,875.09 = 81,338.96 : x
  2. Step 2: Convert to fraction form
    171,351.78/256,875.09 = 81,338.96/x
  3. Step 3: Cross multiply
    171,351.78x = 256,875.09 × 81,338.96
  4. Step 4: Simplify right side
    171,351.78x = 20,893,951,386.13
  5. Step 5: Solve for x
    x = 20,893,951,386.13/171,351.78
  6. Step 6: Final answer
    x = 121,936.00

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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.