Finding the Fourth Proportional to 79.77, 119.44 and 73.09
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Solution
The fourth proportional to 79.77, 119.44 and 73.09 is: 109.44
Step by Step Solution
- Step 1: Write the proportion equation
79.77 : 119.44 = 73.09 : x - Step 2: Convert to fraction form
79.77/119.44 = 73.09/x - Step 3: Cross multiply
79.77x = 119.44 × 73.09 - Step 4: Simplify right side
79.77x = 8,729.44 - Step 5: Solve for x
x = 8,729.44/79.77 - Step 6: Final answer
x = 109.44
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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.