Finding the Fourth Proportional to 120.74, 166.63 and 68.99
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Solution
The fourth proportional to 120.74, 166.63 and 68.99 is: 95.21
Step by Step Solution
- Step 1: Write the proportion equation
120.74 : 166.63 = 68.99 : x - Step 2: Convert to fraction form
120.74/166.63 = 68.99/x - Step 3: Cross multiply
120.74x = 166.63 × 68.99 - Step 4: Simplify right side
120.74x = 11,495.63 - Step 5: Solve for x
x = 11,495.63/120.74 - Step 6: Final answer
x = 95.21
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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.