Finding the Fourth Proportional to 91,121.80, 136,682.70 and 82,811.20
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Solution
The fourth proportional to 91,121.80, 136,682.70 and 82,811.20 is: 124,216.80
Step by Step Solution
- Step 1: Write the proportion equation
91,121.80 : 136,682.70 = 82,811.20 : x - Step 2: Convert to fraction form
91,121.80/136,682.70 = 82,811.20/x - Step 3: Cross multiply
91,121.80x = 136,682.70 × 82,811.20 - Step 4: Simplify right side
91,121.80x = 11,318,858,406.24 - Step 5: Solve for x
x = 11,318,858,406.24/91,121.80 - Step 6: Final answer
x = 124,216.80
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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.