Home / 280,709.60-421,285.55-130,872.75

Finding the Fourth Proportional to 280,709.60, 421,285.55 and 130,872.75

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Solution

The fourth proportional to 280,709.60, 421,285.55 and 130,872.75 is: 196,412.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,709.60 : 421,285.55 = 130,872.75 : x
  2. Step 2: Convert to fraction form
    280,709.60/421,285.55 = 130,872.75/x
  3. Step 3: Cross multiply
    280,709.60x = 421,285.55 × 130,872.75
  4. Step 4: Simplify right side
    280,709.60x = 55,134,797,809.40
  5. Step 5: Solve for x
    x = 55,134,797,809.40/280,709.60
  6. Step 6: Final answer
    x = 196,412.23

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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.