Home / 258,533.25-387,974.90-90,055.05

Finding the Fourth Proportional to 258,533.25, 387,974.90 and 90,055.05

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Solution

The fourth proportional to 258,533.25, 387,974.90 and 90,055.05 is: 135,143.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,533.25 : 387,974.90 = 90,055.05 : x
  2. Step 2: Convert to fraction form
    258,533.25/387,974.90 = 90,055.05/x
  3. Step 3: Cross multiply
    258,533.25x = 387,974.90 × 90,055.05
  4. Step 4: Simplify right side
    258,533.25x = 34,939,099,018.25
  5. Step 5: Solve for x
    x = 34,939,099,018.25/258,533.25
  6. Step 6: Final answer
    x = 135,143.54

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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.