Finding the Fourth Proportional to 90.83, 136.11 and 67.99
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Solution
The fourth proportional to 90.83, 136.11 and 67.99 is: 101.88
Step by Step Solution
- Step 1: Write the proportion equation
90.83 : 136.11 = 67.99 : x - Step 2: Convert to fraction form
90.83/136.11 = 67.99/x - Step 3: Cross multiply
90.83x = 136.11 × 67.99 - Step 4: Simplify right side
90.83x = 9,253.72 - Step 5: Solve for x
x = 9,253.72/90.83 - Step 6: Final answer
x = 101.88
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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.