Finding the Fourth Proportional to 99.87, 149.68 and 73.99
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Solution
The fourth proportional to 99.87, 149.68 and 73.99 is: 110.88
Step by Step Solution
- Step 1: Write the proportion equation
99.87 : 149.68 = 73.99 : x - Step 2: Convert to fraction form
99.87/149.68 = 73.99/x - Step 3: Cross multiply
99.87x = 149.68 × 73.99 - Step 4: Simplify right side
99.87x = 11,073.84 - Step 5: Solve for x
x = 11,073.84/99.87 - Step 6: Final answer
x = 110.88
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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.