Finding the Fourth Proportional to 81,270.80, 121,668.60 and 57,942.80
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Solution
The fourth proportional to 81,270.80, 121,668.60 and 57,942.80 is: 86,744.80
Step by Step Solution
- Step 1: Write the proportion equation
81,270.80 : 121,668.60 = 57,942.80 : x - Step 2: Convert to fraction form
81,270.80/121,668.60 = 57,942.80/x - Step 3: Cross multiply
81,270.80x = 121,668.60 × 57,942.80 - Step 4: Simplify right side
81,270.80x = 7,049,819,356.08 - Step 5: Solve for x
x = 7,049,819,356.08/81,270.80 - Step 6: Final answer
x = 86,744.80
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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.