Finding the Fourth Proportional to 86.05, 129.14 and 69.08
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Solution
The fourth proportional to 86.05, 129.14 and 69.08 is: 103.67
Step by Step Solution
- Step 1: Write the proportion equation
86.05 : 129.14 = 69.08 : x - Step 2: Convert to fraction form
86.05/129.14 = 69.08/x - Step 3: Cross multiply
86.05x = 129.14 × 69.08 - Step 4: Simplify right side
86.05x = 8,920.99 - Step 5: Solve for x
x = 8,920.99/86.05 - Step 6: Final answer
x = 103.67
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.