Finding the Fourth Proportional to 79.95, 119.97 and 74.99
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Solution
The fourth proportional to 79.95, 119.97 and 74.99 is: 112.53
Step by Step Solution
- Step 1: Write the proportion equation
79.95 : 119.97 = 74.99 : x - Step 2: Convert to fraction form
79.95/119.97 = 74.99/x - Step 3: Cross multiply
79.95x = 119.97 × 74.99 - Step 4: Simplify right side
79.95x = 8,996.39 - Step 5: Solve for x
x = 8,996.39/79.95 - Step 6: Final answer
x = 112.53
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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.