Finding the Fourth Proportional to 121.08, 167.15 and 79.66
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Solution
The fourth proportional to 121.08, 167.15 and 79.66 is: 109.96
Step by Step Solution
- Step 1: Write the proportion equation
121.08 : 167.15 = 79.66 : x - Step 2: Convert to fraction form
121.08/167.15 = 79.66/x - Step 3: Cross multiply
121.08x = 167.15 × 79.66 - Step 4: Simplify right side
121.08x = 13,313.93 - Step 5: Solve for x
x = 13,313.93/121.08 - Step 6: Final answer
x = 109.96
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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.