Finding the Fourth Proportional to 76,965.09, 115,328.57 and 51,906.93
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Solution
The fourth proportional to 76,965.09, 115,328.57 and 51,906.93 is: 77,780.09
Step by Step Solution
- Step 1: Write the proportion equation
76,965.09 : 115,328.57 = 51,906.93 : x - Step 2: Convert to fraction form
76,965.09/115,328.57 = 51,906.93/x - Step 3: Cross multiply
76,965.09x = 115,328.57 × 51,906.93 - Step 4: Simplify right side
76,965.09x = 5,986,351,750.46 - Step 5: Solve for x
x = 5,986,351,750.46/76,965.09 - Step 6: Final answer
x = 77,780.09
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1.5x scale
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.