Finding the Fourth Proportional to 79.96, 110.26 and 74.20
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Solution
The fourth proportional to 79.96, 110.26 and 74.20 is: 102.32
Step by Step Solution
- Step 1: Write the proportion equation
79.96 : 110.26 = 74.20 : x - Step 2: Convert to fraction form
79.96/110.26 = 74.20/x - Step 3: Cross multiply
79.96x = 110.26 × 74.20 - Step 4: Simplify right side
79.96x = 8,181.29 - Step 5: Solve for x
x = 8,181.29/79.96 - Step 6: Final answer
x = 102.32
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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.