Home / 280,907.22-421,402.78-103,400.73

Finding the Fourth Proportional to 280,907.22, 421,402.78 and 103,400.73

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Solution

The fourth proportional to 280,907.22, 421,402.78 and 103,400.73 is: 155,116.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,907.22 : 421,402.78 = 103,400.73 : x
  2. Step 2: Convert to fraction form
    280,907.22/421,402.78 = 103,400.73/x
  3. Step 3: Cross multiply
    280,907.22x = 421,402.78 × 103,400.73
  4. Step 4: Simplify right side
    280,907.22x = 43,573,355,076.03
  5. Step 5: Solve for x
    x = 43,573,355,076.03/280,907.22
  6. Step 6: Final answer
    x = 155,116.54

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1.5x scale

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.