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Finding the Fourth Proportional to 172,378.19, 258,608.70 and 54,049.55

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Solution

The fourth proportional to 172,378.19, 258,608.70 and 54,049.55 is: 81,087.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,378.19 : 258,608.70 = 54,049.55 : x
  2. Step 2: Convert to fraction form
    172,378.19/258,608.70 = 54,049.55/x
  3. Step 3: Cross multiply
    172,378.19x = 258,608.70 × 54,049.55
  4. Step 4: Simplify right side
    172,378.19x = 13,977,682,568.04
  5. Step 5: Solve for x
    x = 13,977,682,568.04/172,378.19
  6. Step 6: Final answer
    x = 81,087.31

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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.