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Finding the Fourth Proportional to 121,293.40, 181,940.10 and 108,608.80

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Solution

The fourth proportional to 121,293.40, 181,940.10 and 108,608.80 is: 162,913.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,293.40 : 181,940.10 = 108,608.80 : x
  2. Step 2: Convert to fraction form
    121,293.40/181,940.10 = 108,608.80/x
  3. Step 3: Cross multiply
    121,293.40x = 181,940.10 × 108,608.80
  4. Step 4: Simplify right side
    121,293.40x = 19,760,295,932.88
  5. Step 5: Solve for x
    x = 19,760,295,932.88/121,293.40
  6. Step 6: Final answer
    x = 162,913.20

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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.