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Finding the Fourth Proportional to 300,138.15, 450,040.98 and 122,769.69

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Solution

The fourth proportional to 300,138.15, 450,040.98 and 122,769.69 is: 184,086.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,138.15 : 450,040.98 = 122,769.69 : x
  2. Step 2: Convert to fraction form
    300,138.15/450,040.98 = 122,769.69/x
  3. Step 3: Cross multiply
    300,138.15x = 450,040.98 × 122,769.69
  4. Step 4: Simplify right side
    300,138.15x = 55,251,391,601.90
  5. Step 5: Solve for x
    x = 55,251,391,601.90/300,138.15
  6. Step 6: Final answer
    x = 184,086.53

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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.