Finding the Fourth Proportional to 77,021.28, 115,415.28 and 57,207.60
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Solution
The fourth proportional to 77,021.28, 115,415.28 and 57,207.60 is: 85,724.77
Step by Step Solution
- Step 1: Write the proportion equation
77,021.28 : 115,415.28 = 57,207.60 : x - Step 2: Convert to fraction form
77,021.28/115,415.28 = 57,207.60/x - Step 3: Cross multiply
77,021.28x = 115,415.28 × 57,207.60 - Step 4: Simplify right side
77,021.28x = 6,602,631,172.13 - Step 5: Solve for x
x = 6,602,631,172.13/77,021.28 - Step 6: Final answer
x = 85,724.77
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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.