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Finding the Fourth Proportional to 79,940.82, 119,946.60 and 41,981.16

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Solution

The fourth proportional to 79,940.82, 119,946.60 and 41,981.16 is: 62,990.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,940.82 : 119,946.60 = 41,981.16 : x
  2. Step 2: Convert to fraction form
    79,940.82/119,946.60 = 41,981.16/x
  3. Step 3: Cross multiply
    79,940.82x = 119,946.60 × 41,981.16
  4. Step 4: Simplify right side
    79,940.82x = 5,035,497,406.06
  5. Step 5: Solve for x
    x = 5,035,497,406.06/79,940.82
  6. Step 6: Final answer
    x = 62,990.31

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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.