Home / 280,836,647.40-421,128,999.90-108,256,103.40

Finding the Fourth Proportional to 280,836,647.40, 421,128,999.90 and 108,256,103.40

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Solution

The fourth proportional to 280,836,647.40, 421,128,999.90 and 108,256,103.40 is: 162,335,596.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,836,647.40 : 421,128,999.90 = 108,256,103.40 : x
  2. Step 2: Convert to fraction form
    280,836,647.40/421,128,999.90 = 108,256,103.40/x
  3. Step 3: Cross multiply
    280,836,647.40x = 421,128,999.90 × 108,256,103.40
  4. Step 4: Simplify right side
    280,836,647.40x = 45,589,784,557,912,992
  5. Step 5: Solve for x
    x = 45,589,784,557,912,992/280,836,647.40
  6. Step 6: Final answer
    x = 162,335,596.08

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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.