Finding the Fourth Proportional to 121,815.97, 168,107.23 and 68,103.92
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Solution
The fourth proportional to 121,815.97, 168,107.23 and 68,103.92 is: 93,984.08
Step by Step Solution
- Step 1: Write the proportion equation
121,815.97 : 168,107.23 = 68,103.92 : x - Step 2: Convert to fraction form
121,815.97/168,107.23 = 68,103.92/x - Step 3: Cross multiply
121,815.97x = 168,107.23 × 68,103.92 - Step 4: Simplify right side
121,815.97x = 11,448,761,848.74 - Step 5: Solve for x
x = 11,448,761,848.74/121,815.97 - Step 6: Final answer
x = 93,984.08
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1.5x scale
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.