Finding the Fourth Proportional to 79.11, 118.77 and 68.97
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Solution
The fourth proportional to 79.11, 118.77 and 68.97 is: 103.55
Step by Step Solution
- Step 1: Write the proportion equation
79.11 : 118.77 = 68.97 : x - Step 2: Convert to fraction form
79.11/118.77 = 68.97/x - Step 3: Cross multiply
79.11x = 118.77 × 68.97 - Step 4: Simplify right side
79.11x = 8,191.57 - Step 5: Solve for x
x = 8,191.57/79.11 - Step 6: Final answer
x = 103.55
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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.