Home / 280,939.19-421,396.43-81,255.15

Finding the Fourth Proportional to 280,939.19, 421,396.43 and 81,255.15

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Solution

The fourth proportional to 280,939.19, 421,396.43 and 81,255.15 is: 121,879.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,939.19 : 421,396.43 = 81,255.15 : x
  2. Step 2: Convert to fraction form
    280,939.19/421,396.43 = 81,255.15/x
  3. Step 3: Cross multiply
    280,939.19x = 421,396.43 × 81,255.15
  4. Step 4: Simplify right side
    280,939.19x = 34,240,629,722.84
  5. Step 5: Solve for x
    x = 34,240,629,722.84/280,939.19
  6. Step 6: Final answer
    x = 121,879.15

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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.