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Finding the Fourth Proportional to 168,940.80, 233,115.24 and 100,943.40

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Solution

The fourth proportional to 168,940.80, 233,115.24 and 100,943.40 is: 139,288.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,940.80 : 233,115.24 = 100,943.40 : x
  2. Step 2: Convert to fraction form
    168,940.80/233,115.24 = 100,943.40/x
  3. Step 3: Cross multiply
    168,940.80x = 233,115.24 × 100,943.40
  4. Step 4: Simplify right side
    168,940.80x = 23,531,444,917.42
  5. Step 5: Solve for x
    x = 23,531,444,917.42/168,940.80
  6. Step 6: Final answer
    x = 139,288.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.