Finding the Fourth Proportional to 86,791.80, 129,993.30 and 84,847.80
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Solution
The fourth proportional to 86,791.80, 129,993.30 and 84,847.80 is: 127,081.65
Step by Step Solution
- Step 1: Write the proportion equation
86,791.80 : 129,993.30 = 84,847.80 : x - Step 2: Convert to fraction form
86,791.80/129,993.30 = 84,847.80/x - Step 3: Cross multiply
86,791.80x = 129,993.30 × 84,847.80 - Step 4: Simplify right side
86,791.80x = 11,029,645,519.74 - Step 5: Solve for x
x = 11,029,645,519.74/86,791.80 - Step 6: Final answer
x = 127,081.65
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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.