Finding the Fourth Proportional to 76,986.80, 115,480.20 and 50,721.20
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Solution
The fourth proportional to 76,986.80, 115,480.20 and 50,721.20 is: 76,081.80
Step by Step Solution
- Step 1: Write the proportion equation
76,986.80 : 115,480.20 = 50,721.20 : x - Step 2: Convert to fraction form
76,986.80/115,480.20 = 50,721.20/x - Step 3: Cross multiply
76,986.80x = 115,480.20 × 50,721.20 - Step 4: Simplify right side
76,986.80x = 5,857,294,320.24 - Step 5: Solve for x
x = 5,857,294,320.24/76,986.80 - Step 6: Final answer
x = 76,081.80
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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.