Finding the Fourth Proportional to 86,815.60, 121,716.80 and 86,815.60
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Solution
The fourth proportional to 86,815.60, 121,716.80 and 86,815.60 is: 121,716.80
Step by Step Solution
- Step 1: Write the proportion equation
86,815.60 : 121,716.80 = 86,815.60 : x - Step 2: Convert to fraction form
86,815.60/121,716.80 = 86,815.60/x - Step 3: Cross multiply
86,815.60x = 121,716.80 × 86,815.60 - Step 4: Simplify right side
86,815.60x = 10,566,917,022.08 - Step 5: Solve for x
x = 10,566,917,022.08/86,815.60 - Step 6: Final answer
x = 121,716.80
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.