Home / 258,289.22-386,712.12-139,535.12

Finding the Fourth Proportional to 258,289.22, 386,712.12 and 139,535.12

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Solution

The fourth proportional to 258,289.22, 386,712.12 and 139,535.12 is: 208,912.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,289.22 : 386,712.12 = 139,535.12 : x
  2. Step 2: Convert to fraction form
    258,289.22/386,712.12 = 139,535.12/x
  3. Step 3: Cross multiply
    258,289.22x = 386,712.12 × 139,535.12
  4. Step 4: Simplify right side
    258,289.22x = 53,959,922,069.65
  5. Step 5: Solve for x
    x = 53,959,922,069.65/258,289.22
  6. Step 6: Final answer
    x = 208,912.79

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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.