Finding the Fourth Proportional to 79.96, 120.11 and 69.79
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Solution
The fourth proportional to 79.96, 120.11 and 69.79 is: 104.82
Step by Step Solution
- Step 1: Write the proportion equation
79.96 : 120.11 = 69.79 : x - Step 2: Convert to fraction form
79.96/120.11 = 69.79/x - Step 3: Cross multiply
79.96x = 120.11 × 69.79 - Step 4: Simplify right side
79.96x = 8,381.91 - Step 5: Solve for x
x = 8,381.91/79.96 - Step 6: Final answer
x = 104.82
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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.