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Finding the Fourth Proportional to 203,986.60, 281,455.50 and 123,412.12

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Solution

The fourth proportional to 203,986.60, 281,455.50 and 123,412.12 is: 170,280.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,986.60 : 281,455.50 = 123,412.12 : x
  2. Step 2: Convert to fraction form
    203,986.60/281,455.50 = 123,412.12/x
  3. Step 3: Cross multiply
    203,986.60x = 281,455.50 × 123,412.12
  4. Step 4: Simplify right side
    203,986.60x = 34,735,019,940.66
  5. Step 5: Solve for x
    x = 34,735,019,940.66/203,986.60
  6. Step 6: Final answer
    x = 170,280.89

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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.