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Finding the Fourth Proportional to 193,348.85, 290,037.09 and 80,915.86

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Solution

The fourth proportional to 193,348.85, 290,037.09 and 80,915.86 is: 121,379.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,348.85 : 290,037.09 = 80,915.86 : x
  2. Step 2: Convert to fraction form
    193,348.85/290,037.09 = 80,915.86/x
  3. Step 3: Cross multiply
    193,348.85x = 290,037.09 × 80,915.86
  4. Step 4: Simplify right side
    193,348.85x = 23,468,599,119.06
  5. Step 5: Solve for x
    x = 23,468,599,119.06/193,348.85
  6. Step 6: Final answer
    x = 121,379.56

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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.