Finding the Fourth Proportional to 76,821.40, 115,232.10 and 53,201.80
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Solution
The fourth proportional to 76,821.40, 115,232.10 and 53,201.80 is: 79,802.70
Step by Step Solution
- Step 1: Write the proportion equation
76,821.40 : 115,232.10 = 53,201.80 : x - Step 2: Convert to fraction form
76,821.40/115,232.10 = 53,201.80/x - Step 3: Cross multiply
76,821.40x = 115,232.10 × 53,201.80 - Step 4: Simplify right side
76,821.40x = 6,130,555,137.78 - Step 5: Solve for x
x = 6,130,555,137.78/76,821.40 - Step 6: Final answer
x = 79,802.70
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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.