Finding the Fourth Proportional to 115.20, 158.58 and 102.68
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Solution
The fourth proportional to 115.20, 158.58 and 102.68 is: 141.35
Step by Step Solution
- Step 1: Write the proportion equation
115.20 : 158.58 = 102.68 : x - Step 2: Convert to fraction form
115.20/158.58 = 102.68/x - Step 3: Cross multiply
115.20x = 158.58 × 102.68 - Step 4: Simplify right side
115.20x = 16,282.99 - Step 5: Solve for x
x = 16,282.99/115.20 - Step 6: Final answer
x = 141.35
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.