Finding the Fourth Proportional to 79.94, 120.00 and 67.99
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Solution
The fourth proportional to 79.94, 120.00 and 67.99 is: 102.07
Step by Step Solution
- Step 1: Write the proportion equation
79.94 : 120.00 = 67.99 : x - Step 2: Convert to fraction form
79.94/120.00 = 67.99/x - Step 3: Cross multiply
79.94x = 120.00 × 67.99 - Step 4: Simplify right side
79.94x = 8,158.67 - Step 5: Solve for x
x = 8,158.67/79.94 - Step 6: Final answer
x = 102.07
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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.