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Finding the Fourth Proportional to 171,161.30, 256,639.42 and 81,226.39

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Solution

The fourth proportional to 171,161.30, 256,639.42 and 81,226.39 is: 121,790.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,161.30 : 256,639.42 = 81,226.39 : x
  2. Step 2: Convert to fraction form
    171,161.30/256,639.42 = 81,226.39/x
  3. Step 3: Cross multiply
    171,161.30x = 256,639.42 × 81,226.39
  4. Step 4: Simplify right side
    171,161.30x = 20,845,893,618.29
  5. Step 5: Solve for x
    x = 20,845,893,618.29/171,161.30
  6. Step 6: Final answer
    x = 121,790.93

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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.