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Finding the Fourth Proportional to 203,679.30, 305,628.30 and 85,362.60

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Solution

The fourth proportional to 203,679.30, 305,628.30 and 85,362.60 is: 128,089.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,679.30 : 305,628.30 = 85,362.60 : x
  2. Step 2: Convert to fraction form
    203,679.30/305,628.30 = 85,362.60/x
  3. Step 3: Cross multiply
    203,679.30x = 305,628.30 × 85,362.60
  4. Step 4: Simplify right side
    203,679.30x = 26,089,226,321.58
  5. Step 5: Solve for x
    x = 26,089,226,321.58/203,679.30
  6. Step 6: Final answer
    x = 128,089.73

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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.