Finding the Fourth Proportional to 72.06, 108.29 and 51.90
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Solution
The fourth proportional to 72.06, 108.29 and 51.90 is: 77.99
Step by Step Solution
- Step 1: Write the proportion equation
72.06 : 108.29 = 51.90 : x - Step 2: Convert to fraction form
72.06/108.29 = 51.90/x - Step 3: Cross multiply
72.06x = 108.29 × 51.90 - Step 4: Simplify right side
72.06x = 5,620.25 - Step 5: Solve for x
x = 5,620.25/72.06 - Step 6: Final answer
x = 77.99
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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.