Home / 203,145,838.30-280,365,189.20-120,639,623.05

Finding the Fourth Proportional to 203,145,838.30, 280,365,189.20 and 120,639,623.05

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Solution

The fourth proportional to 203,145,838.30, 280,365,189.20 and 120,639,623.05 is: 166,496,892.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,145,838.30 : 280,365,189.20 = 120,639,623.05 : x
  2. Step 2: Convert to fraction form
    203,145,838.30/280,365,189.20 = 120,639,623.05/x
  3. Step 3: Cross multiply
    203,145,838.30x = 280,365,189.20 × 120,639,623.05
  4. Step 4: Simplify right side
    203,145,838.30x = 33,823,150,741,429,928
  5. Step 5: Solve for x
    x = 33,823,150,741,429,928/203,145,838.30
  6. Step 6: Final answer
    x = 166,496,892.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.