Finding the Fourth Proportional to 93.97, 140.99 and 81.21
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Solution
The fourth proportional to 93.97, 140.99 and 81.21 is: 121.85
Step by Step Solution
- Step 1: Write the proportion equation
93.97 : 140.99 = 81.21 : x - Step 2: Convert to fraction form
93.97/140.99 = 81.21/x - Step 3: Cross multiply
93.97x = 140.99 × 81.21 - Step 4: Simplify right side
93.97x = 11,449.30 - Step 5: Solve for x
x = 11,449.30/93.97 - Step 6: Final answer
x = 121.85
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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.