Finding the Fourth Proportional to 90.51, 135.86 and 51.99
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Solution
The fourth proportional to 90.51, 135.86 and 51.99 is: 78.04
Step by Step Solution
- Step 1: Write the proportion equation
90.51 : 135.86 = 51.99 : x - Step 2: Convert to fraction form
90.51/135.86 = 51.99/x - Step 3: Cross multiply
90.51x = 135.86 × 51.99 - Step 4: Simplify right side
90.51x = 7,063.10 - Step 5: Solve for x
x = 7,063.10/90.51 - Step 6: Final answer
x = 78.04
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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.