Finding the Fourth Proportional to 158.10, 236.84 and 76.99
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Solution
The fourth proportional to 158.10, 236.84 and 76.99 is: 115.34
Step by Step Solution
- Step 1: Write the proportion equation
158.10 : 236.84 = 76.99 : x - Step 2: Convert to fraction form
158.10/236.84 = 76.99/x - Step 3: Cross multiply
158.10x = 236.84 × 76.99 - Step 4: Simplify right side
158.10x = 18,233.93 - Step 5: Solve for x
x = 18,233.93/158.10 - Step 6: Final answer
x = 115.34
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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.