Home / 280,928.19-421,454.72-131,086.75

Finding the Fourth Proportional to 280,928.19, 421,454.72 and 131,086.75

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Solution

The fourth proportional to 280,928.19, 421,454.72 and 131,086.75 is: 196,659.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,928.19 : 421,454.72 = 131,086.75 : x
  2. Step 2: Convert to fraction form
    280,928.19/421,454.72 = 131,086.75/x
  3. Step 3: Cross multiply
    280,928.19x = 421,454.72 × 131,086.75
  4. Step 4: Simplify right side
    280,928.19x = 55,247,128,791.04
  5. Step 5: Solve for x
    x = 55,247,128,791.04/280,928.19
  6. Step 6: Final answer
    x = 196,659.26

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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.