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Finding the Fourth Proportional to 170,058.70, 255,092.25 and 81,321.58

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Solution

The fourth proportional to 170,058.70, 255,092.25 and 81,321.58 is: 121,984.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,058.70 : 255,092.25 = 81,321.58 : x
  2. Step 2: Convert to fraction form
    170,058.70/255,092.25 = 81,321.58/x
  3. Step 3: Cross multiply
    170,058.70x = 255,092.25 × 81,321.58
  4. Step 4: Simplify right side
    170,058.70x = 20,744,504,815.76
  5. Step 5: Solve for x
    x = 20,744,504,815.76/170,058.70
  6. Step 6: Final answer
    x = 121,984.38

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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.