Finding the Fourth Proportional to 80,803.98, 121,692.20 and 71,560.26
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Solution
The fourth proportional to 80,803.98, 121,692.20 and 71,560.26 is: 107,770.99
Step by Step Solution
- Step 1: Write the proportion equation
80,803.98 : 121,692.20 = 71,560.26 : x - Step 2: Convert to fraction form
80,803.98/121,692.20 = 71,560.26/x - Step 3: Cross multiply
80,803.98x = 121,692.20 × 71,560.26 - Step 4: Simplify right side
80,803.98x = 8,708,325,114.17 - Step 5: Solve for x
x = 8,708,325,114.17/80,803.98 - Step 6: Final answer
x = 107,770.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.