Finding the Fourth Proportional to 90.86, 136.29 and 29.99
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Solution
The fourth proportional to 90.86, 136.29 and 29.99 is: 44.98
Step by Step Solution
- Step 1: Write the proportion equation
90.86 : 136.29 = 29.99 : x - Step 2: Convert to fraction form
90.86/136.29 = 29.99/x - Step 3: Cross multiply
90.86x = 136.29 × 29.99 - Step 4: Simplify right side
90.86x = 4,086.66 - Step 5: Solve for x
x = 4,086.66/90.86 - Step 6: Final answer
x = 44.98
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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.