Home / 258,285.15-387,427.14-68,745.54

Finding the Fourth Proportional to 258,285.15, 387,427.14 and 68,745.54

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Solution

The fourth proportional to 258,285.15, 387,427.14 and 68,745.54 is: 103,118.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,285.15 : 387,427.14 = 68,745.54 : x
  2. Step 2: Convert to fraction form
    258,285.15/387,427.14 = 68,745.54/x
  3. Step 3: Cross multiply
    258,285.15x = 387,427.14 × 68,745.54
  4. Step 4: Simplify right side
    258,285.15x = 26,633,887,949.96
  5. Step 5: Solve for x
    x = 26,633,887,949.96/258,285.15
  6. Step 6: Final answer
    x = 103,118.15

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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.