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Finding the Fourth Proportional to 172,040.31, 258,060.47 and 53,721.79

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Solution

The fourth proportional to 172,040.31, 258,060.47 and 53,721.79 is: 80,582.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,040.31 : 258,060.47 = 53,721.79 : x
  2. Step 2: Convert to fraction form
    172,040.31/258,060.47 = 53,721.79/x
  3. Step 3: Cross multiply
    172,040.31x = 258,060.47 × 53,721.79
  4. Step 4: Simplify right side
    172,040.31x = 13,863,469,462.88
  5. Step 5: Solve for x
    x = 13,863,469,462.88/172,040.31
  6. Step 6: Final answer
    x = 80,582.68

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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.