Finding the Fourth Proportional to 71.99, 107.99 and 54.98
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Solution
The fourth proportional to 71.99, 107.99 and 54.98 is: 82.48
Step by Step Solution
- Step 1: Write the proportion equation
71.99 : 107.99 = 54.98 : x - Step 2: Convert to fraction form
71.99/107.99 = 54.98/x - Step 3: Cross multiply
71.99x = 107.99 × 54.98 - Step 4: Simplify right side
71.99x = 5,937.70 - Step 5: Solve for x
x = 5,937.70/71.99 - Step 6: Final answer
x = 82.48
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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.