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Finding the Fourth Proportional to 121,991.91, 182,861 and 47,163.45

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Solution

The fourth proportional to 121,991.91, 182,861 and 47,163.45 is: 70,696.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,991.91 : 182,861 = 47,163.45 : x
  2. Step 2: Convert to fraction form
    121,991.91/182,861 = 47,163.45/x
  3. Step 3: Cross multiply
    121,991.91x = 182,861 × 47,163.45
  4. Step 4: Simplify right side
    121,991.91x = 8,624,355,630.45
  5. Step 5: Solve for x
    x = 8,624,355,630.45/121,991.91
  6. Step 6: Final answer
    x = 70,696.13

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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.