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Finding the Fourth Proportional to 193,481.60, 290,334.48 and 81,151.81

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Solution

The fourth proportional to 193,481.60, 290,334.48 and 81,151.81 is: 121,774.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,481.60 : 290,334.48 = 81,151.81 : x
  2. Step 2: Convert to fraction form
    193,481.60/290,334.48 = 81,151.81/x
  3. Step 3: Cross multiply
    193,481.60x = 290,334.48 × 81,151.81
  4. Step 4: Simplify right side
    193,481.60x = 23,561,167,527.25
  5. Step 5: Solve for x
    x = 23,561,167,527.25/193,481.60
  6. Step 6: Final answer
    x = 121,774.72

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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.