Finding the Fourth Proportional to 91,122.81, 125,681.56 and 66,916.18
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Solution
The fourth proportional to 91,122.81, 125,681.56 and 66,916.18 is: 92,294.45
Step by Step Solution
- Step 1: Write the proportion equation
91,122.81 : 125,681.56 = 66,916.18 : x - Step 2: Convert to fraction form
91,122.81/125,681.56 = 66,916.18/x - Step 3: Cross multiply
91,122.81x = 125,681.56 × 66,916.18 - Step 4: Simplify right side
91,122.81x = 8,410,129,891.64 - Step 5: Solve for x
x = 8,410,129,891.64/91,122.81 - Step 6: Final answer
x = 92,294.45
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1.5x scale
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.