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Finding the Fourth Proportional to 81,190.58, 121,861.80 and 41,238.14

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Solution

The fourth proportional to 81,190.58, 121,861.80 and 41,238.14 is: 61,895.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,190.58 : 121,861.80 = 41,238.14 : x
  2. Step 2: Convert to fraction form
    81,190.58/121,861.80 = 41,238.14/x
  3. Step 3: Cross multiply
    81,190.58x = 121,861.80 × 41,238.14
  4. Step 4: Simplify right side
    81,190.58x = 5,025,353,359.74
  5. Step 5: Solve for x
    x = 5,025,353,359.74/81,190.58
  6. Step 6: Final answer
    x = 61,895.77

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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.