Finding the Fourth Proportional to 107.99, 161.96 and 47.12
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Solution
The fourth proportional to 107.99, 161.96 and 47.12 is: 70.66
Step by Step Solution
- Step 1: Write the proportion equation
107.99 : 161.96 = 47.12 : x - Step 2: Convert to fraction form
107.99/161.96 = 47.12/x - Step 3: Cross multiply
107.99x = 161.96 × 47.12 - Step 4: Simplify right side
107.99x = 7,630.51 - Step 5: Solve for x
x = 7,630.51/107.99 - Step 6: Final answer
x = 70.66
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.