Finding the Fourth Proportional to 91,121.68, 125,750.40 and 57,126.98
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Solution
The fourth proportional to 91,121.68, 125,750.40 and 57,126.98 is: 78,836.79
Step by Step Solution
- Step 1: Write the proportion equation
91,121.68 : 125,750.40 = 57,126.98 : x - Step 2: Convert to fraction form
91,121.68/125,750.40 = 57,126.98/x - Step 3: Cross multiply
91,121.68x = 125,750.40 × 57,126.98 - Step 4: Simplify right side
91,121.68x = 7,183,740,585.79 - Step 5: Solve for x
x = 7,183,740,585.79/91,121.68 - Step 6: Final answer
x = 78,836.79
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.