Finding the Fourth Proportional to 70.08, 97.11 and 69.21
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Solution
The fourth proportional to 70.08, 97.11 and 69.21 is: 95.90
Step by Step Solution
- Step 1: Write the proportion equation
70.08 : 97.11 = 69.21 : x - Step 2: Convert to fraction form
70.08/97.11 = 69.21/x - Step 3: Cross multiply
70.08x = 97.11 × 69.21 - Step 4: Simplify right side
70.08x = 6,720.98 - Step 5: Solve for x
x = 6,720.98/70.08 - Step 6: Final answer
x = 95.90
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.