Finding the Fourth Proportional to 121.07, 167.09 and 68.63
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Solution
The fourth proportional to 121.07, 167.09 and 68.63 is: 94.71
Step by Step Solution
- Step 1: Write the proportion equation
121.07 : 167.09 = 68.63 : x - Step 2: Convert to fraction form
121.07/167.09 = 68.63/x - Step 3: Cross multiply
121.07x = 167.09 × 68.63 - Step 4: Simplify right side
121.07x = 11,466.21 - Step 5: Solve for x
x = 11,466.21/121.07 - Step 6: Final answer
x = 94.71
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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.