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Finding the Fourth Proportional to 201,105.20, 301,398.60 and 122,135.60

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Solution

The fourth proportional to 201,105.20, 301,398.60 and 122,135.60 is: 183,045.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,105.20 : 301,398.60 = 122,135.60 : x
  2. Step 2: Convert to fraction form
    201,105.20/301,398.60 = 122,135.60/x
  3. Step 3: Cross multiply
    201,105.20x = 301,398.60 × 122,135.60
  4. Step 4: Simplify right side
    201,105.20x = 36,811,498,850.16
  5. Step 5: Solve for x
    x = 36,811,498,850.16/201,105.20
  6. Step 6: Final answer
    x = 183,045.98

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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.