Finding the Fourth Proportional to 121,912.75, 168,242.97 and 68,207.05
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Solution
The fourth proportional to 121,912.75, 168,242.97 and 68,207.05 is: 94,127.62
Step by Step Solution
- Step 1: Write the proportion equation
121,912.75 : 168,242.97 = 68,207.05 : x - Step 2: Convert to fraction form
121,912.75/168,242.97 = 68,207.05/x - Step 3: Cross multiply
121,912.75x = 168,242.97 × 68,207.05 - Step 4: Simplify right side
121,912.75x = 11,475,356,666.94 - Step 5: Solve for x
x = 11,475,356,666.94/121,912.75 - Step 6: Final answer
x = 94,127.62
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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.