Finding the Fourth Proportional to 91,202.20, 136,803.30 and 80,315.80
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Solution
The fourth proportional to 91,202.20, 136,803.30 and 80,315.80 is: 120,473.70
Step by Step Solution
- Step 1: Write the proportion equation
91,202.20 : 136,803.30 = 80,315.80 : x - Step 2: Convert to fraction form
91,202.20/136,803.30 = 80,315.80/x - Step 3: Cross multiply
91,202.20x = 136,803.30 × 80,315.80 - Step 4: Simplify right side
91,202.20x = 10,987,466,482.14 - Step 5: Solve for x
x = 10,987,466,482.14/91,202.20 - Step 6: Final answer
x = 120,473.70
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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.