Finding the Fourth Proportional to 121,640.19, 167,942.45 and 108,871.23
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Solution
The fourth proportional to 121,640.19, 167,942.45 and 108,871.23 is: 150,312.99
Step by Step Solution
- Step 1: Write the proportion equation
121,640.19 : 167,942.45 = 108,871.23 : x - Step 2: Convert to fraction form
121,640.19/167,942.45 = 108,871.23/x - Step 3: Cross multiply
121,640.19x = 167,942.45 × 108,871.23 - Step 4: Simplify right side
121,640.19x = 18,284,100,556.36 - Step 5: Solve for x
x = 18,284,100,556.36/121,640.19 - Step 6: Final answer
x = 150,312.99
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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.