Home / 280,448.06-420,672.78-111,982.10

Finding the Fourth Proportional to 280,448.06, 420,672.78 and 111,982.10

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Solution

The fourth proportional to 280,448.06, 420,672.78 and 111,982.10 is: 167,973.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,448.06 : 420,672.78 = 111,982.10 : x
  2. Step 2: Convert to fraction form
    280,448.06/420,672.78 = 111,982.10/x
  3. Step 3: Cross multiply
    280,448.06x = 420,672.78 × 111,982.10
  4. Step 4: Simplify right side
    280,448.06x = 47,107,819,213.87
  5. Step 5: Solve for x
    x = 47,107,819,213.87/280,448.06
  6. Step 6: Final answer
    x = 167,973.42

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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.