Home / 258,828.92-388,260.12-81,343.34

Finding the Fourth Proportional to 258,828.92, 388,260.12 and 81,343.34

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Solution

The fourth proportional to 258,828.92, 388,260.12 and 81,343.34 is: 122,020.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,828.92 : 388,260.12 = 81,343.34 : x
  2. Step 2: Convert to fraction form
    258,828.92/388,260.12 = 81,343.34/x
  3. Step 3: Cross multiply
    258,828.92x = 388,260.12 × 81,343.34
  4. Step 4: Simplify right side
    258,828.92x = 31,582,374,949.60
  5. Step 5: Solve for x
    x = 31,582,374,949.60/258,828.92
  6. Step 6: Final answer
    x = 122,020.27

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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.