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Finding the Fourth Proportional to 171,352.78, 256,876.59 and 81,339.96

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Solution

The fourth proportional to 171,352.78, 256,876.59 and 81,339.96 is: 121,937.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,352.78 : 256,876.59 = 81,339.96 : x
  2. Step 2: Convert to fraction form
    171,352.78/256,876.59 = 81,339.96/x
  3. Step 3: Cross multiply
    171,352.78x = 256,876.59 × 81,339.96
  4. Step 4: Simplify right side
    171,352.78x = 20,894,331,555.54
  5. Step 5: Solve for x
    x = 20,894,331,555.54/171,352.78
  6. Step 6: Final answer
    x = 121,937.51

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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.