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Finding the Fourth Proportional to 203,980.41, 305,865.02 and 91,563.83

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Solution

The fourth proportional to 203,980.41, 305,865.02 and 91,563.83 is: 137,298.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,980.41 : 305,865.02 = 91,563.83 : x
  2. Step 2: Convert to fraction form
    203,980.41/305,865.02 = 91,563.83/x
  3. Step 3: Cross multiply
    203,980.41x = 305,865.02 × 91,563.83
  4. Step 4: Simplify right side
    203,980.41x = 28,006,170,707.08
  5. Step 5: Solve for x
    x = 28,006,170,707.08/203,980.41
  6. Step 6: Final answer
    x = 137,298.34

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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.