Finding the Fourth Proportional to 79.99, 120.11 and 31.99
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Solution
The fourth proportional to 79.99, 120.11 and 31.99 is: 48.03
Step by Step Solution
- Step 1: Write the proportion equation
79.99 : 120.11 = 31.99 : x - Step 2: Convert to fraction form
79.99/120.11 = 31.99/x - Step 3: Cross multiply
79.99x = 120.11 × 31.99 - Step 4: Simplify right side
79.99x = 3,842.32 - Step 5: Solve for x
x = 3,842.32/79.99 - Step 6: Final answer
x = 48.03
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.