Finding the Fourth Proportional to 79.99, 110.28 and 74.19
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Solution
The fourth proportional to 79.99, 110.28 and 74.19 is: 102.28
Step by Step Solution
- Step 1: Write the proportion equation
79.99 : 110.28 = 74.19 : x - Step 2: Convert to fraction form
79.99/110.28 = 74.19/x - Step 3: Cross multiply
79.99x = 110.28 × 74.19 - Step 4: Simplify right side
79.99x = 8,181.67 - Step 5: Solve for x
x = 8,181.67/79.99 - Step 6: Final answer
x = 102.28
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.