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Finding the Fourth Proportional to 203,674.60, 305,389.17 and 91,334.50

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Solution

The fourth proportional to 203,674.60, 305,389.17 and 91,334.50 is: 136,946.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,674.60 : 305,389.17 = 91,334.50 : x
  2. Step 2: Convert to fraction form
    203,674.60/305,389.17 = 91,334.50/x
  3. Step 3: Cross multiply
    203,674.60x = 305,389.17 × 91,334.50
  4. Step 4: Simplify right side
    203,674.60x = 27,892,567,147.37
  5. Step 5: Solve for x
    x = 27,892,567,147.37/203,674.60
  6. Step 6: Final answer
    x = 136,946.71

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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.