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Finding the Fourth Proportional to 258,057.08, 386,986.90 and 84,908.50

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Solution

The fourth proportional to 258,057.08, 386,986.90 and 84,908.50 is: 127,330.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,057.08 : 386,986.90 = 84,908.50 : x
  2. Step 2: Convert to fraction form
    258,057.08/386,986.90 = 84,908.50/x
  3. Step 3: Cross multiply
    258,057.08x = 386,986.90 × 84,908.50
  4. Step 4: Simplify right side
    258,057.08x = 32,858,477,198.65
  5. Step 5: Solve for x
    x = 32,858,477,198.65/258,057.08
  6. Step 6: Final answer
    x = 127,330.27

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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.