Finding the Fourth Proportional to 90.72, 125.07 and 75.99
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Solution
The fourth proportional to 90.72, 125.07 and 75.99 is: 104.76
Step by Step Solution
- Step 1: Write the proportion equation
90.72 : 125.07 = 75.99 : x - Step 2: Convert to fraction form
90.72/125.07 = 75.99/x - Step 3: Cross multiply
90.72x = 125.07 × 75.99 - Step 4: Simplify right side
90.72x = 9,504.07 - Step 5: Solve for x
x = 9,504.07/90.72 - Step 6: Final answer
x = 104.76
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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.