Finding the Fourth Proportional to 86.37, 129.57 and 55.99
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Solution
The fourth proportional to 86.37, 129.57 and 55.99 is: 83.99
Step by Step Solution
- Step 1: Write the proportion equation
86.37 : 129.57 = 55.99 : x - Step 2: Convert to fraction form
86.37/129.57 = 55.99/x - Step 3: Cross multiply
86.37x = 129.57 × 55.99 - Step 4: Simplify right side
86.37x = 7,254.62 - Step 5: Solve for x
x = 7,254.62/86.37 - Step 6: Final answer
x = 83.99
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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.