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Finding the Fourth Proportional to 159,391.54, 219,960.31 and 87,771.39

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Solution

The fourth proportional to 159,391.54, 219,960.31 and 87,771.39 is: 121,124.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,391.54 : 219,960.31 = 87,771.39 : x
  2. Step 2: Convert to fraction form
    159,391.54/219,960.31 = 87,771.39/x
  3. Step 3: Cross multiply
    159,391.54x = 219,960.31 × 87,771.39
  4. Step 4: Simplify right side
    159,391.54x = 19,306,222,153.53
  5. Step 5: Solve for x
    x = 19,306,222,153.53/159,391.54
  6. Step 6: Final answer
    x = 121,124.51

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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.