Finding the Fourth Proportional to 81,436.20, 121,986.16 and 60,399.99
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Solution
The fourth proportional to 81,436.20, 121,986.16 and 60,399.99 is: 90,475.28
Step by Step Solution
- Step 1: Write the proportion equation
81,436.20 : 121,986.16 = 60,399.99 : x - Step 2: Convert to fraction form
81,436.20/121,986.16 = 60,399.99/x - Step 3: Cross multiply
81,436.20x = 121,986.16 × 60,399.99 - Step 4: Simplify right side
81,436.20x = 7,367,962,844.14 - Step 5: Solve for x
x = 7,367,962,844.14/81,436.20 - Step 6: Final answer
x = 90,475.28
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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.