Finding the Fourth Proportional to 105.99, 158.85 and 87.99
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Solution
The fourth proportional to 105.99, 158.85 and 87.99 is: 131.87
Step by Step Solution
- Step 1: Write the proportion equation
105.99 : 158.85 = 87.99 : x - Step 2: Convert to fraction form
105.99/158.85 = 87.99/x - Step 3: Cross multiply
105.99x = 158.85 × 87.99 - Step 4: Simplify right side
105.99x = 13,977.21 - Step 5: Solve for x
x = 13,977.21/105.99 - Step 6: Final answer
x = 131.87
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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.