Finding the Fourth Proportional to 69.11, 102.97 and 68.12
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Solution
The fourth proportional to 69.11, 102.97 and 68.12 is: 101.50
Step by Step Solution
- Step 1: Write the proportion equation
69.11 : 102.97 = 68.12 : x - Step 2: Convert to fraction form
69.11/102.97 = 68.12/x - Step 3: Cross multiply
69.11x = 102.97 × 68.12 - Step 4: Simplify right side
69.11x = 7,014.79 - Step 5: Solve for x
x = 7,014.79/69.11 - Step 6: Final answer
x = 101.50
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.