Home / 258,826.92-388,257.12-81,341.34

Finding the Fourth Proportional to 258,826.92, 388,257.12 and 81,341.34

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Solution

The fourth proportional to 258,826.92, 388,257.12 and 81,341.34 is: 122,017.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,826.92 : 388,257.12 = 81,341.34 : x
  2. Step 2: Convert to fraction form
    258,826.92/388,257.12 = 81,341.34/x
  3. Step 3: Cross multiply
    258,826.92x = 388,257.12 × 81,341.34
  4. Step 4: Simplify right side
    258,826.92x = 31,581,354,405.34
  5. Step 5: Solve for x
    x = 31,581,354,405.34/258,826.92
  6. Step 6: Final answer
    x = 122,017.27

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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.