Finding the Fourth Proportional to 72.15, 108.14 and 54.99
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Solution
The fourth proportional to 72.15, 108.14 and 54.99 is: 82.42
Step by Step Solution
- Step 1: Write the proportion equation
72.15 : 108.14 = 54.99 : x - Step 2: Convert to fraction form
72.15/108.14 = 54.99/x - Step 3: Cross multiply
72.15x = 108.14 × 54.99 - Step 4: Simplify right side
72.15x = 5,946.34 - Step 5: Solve for x
x = 5,946.34/72.15 - Step 6: Final answer
x = 82.42
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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.