Finding the Fourth Proportional to 89.21, 122.94 and 69.53
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Solution
The fourth proportional to 89.21, 122.94 and 69.53 is: 95.82
Step by Step Solution
- Step 1: Write the proportion equation
89.21 : 122.94 = 69.53 : x - Step 2: Convert to fraction form
89.21/122.94 = 69.53/x - Step 3: Cross multiply
89.21x = 122.94 × 69.53 - Step 4: Simplify right side
89.21x = 8,547.40 - Step 5: Solve for x
x = 8,547.40/89.21 - Step 6: Final answer
x = 95.82
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.