Finding the Fourth Proportional to 157.37, 235.99 and 86.99
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Solution
The fourth proportional to 157.37, 235.99 and 86.99 is: 130.45
Step by Step Solution
- Step 1: Write the proportion equation
157.37 : 235.99 = 86.99 : x - Step 2: Convert to fraction form
157.37/235.99 = 86.99/x - Step 3: Cross multiply
157.37x = 235.99 × 86.99 - Step 4: Simplify right side
157.37x = 20,529.03 - Step 5: Solve for x
x = 20,529.03/157.37 - Step 6: Final answer
x = 130.45
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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.