Finding the Fourth Proportional to 80.28, 110.70 and 72.99
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Solution
The fourth proportional to 80.28, 110.70 and 72.99 is: 100.65
Step by Step Solution
- Step 1: Write the proportion equation
80.28 : 110.70 = 72.99 : x - Step 2: Convert to fraction form
80.28/110.70 = 72.99/x - Step 3: Cross multiply
80.28x = 110.70 × 72.99 - Step 4: Simplify right side
80.28x = 8,079.99 - Step 5: Solve for x
x = 8,079.99/80.28 - Step 6: Final answer
x = 100.65
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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.