Finding the Fourth Proportional to 79.26, 118.08 and 76.17
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Solution
The fourth proportional to 79.26, 118.08 and 76.17 is: 113.48
Step by Step Solution
- Step 1: Write the proportion equation
79.26 : 118.08 = 76.17 : x - Step 2: Convert to fraction form
79.26/118.08 = 76.17/x - Step 3: Cross multiply
79.26x = 118.08 × 76.17 - Step 4: Simplify right side
79.26x = 8,994.15 - Step 5: Solve for x
x = 8,994.15/79.26 - Step 6: Final answer
x = 113.48
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.