Finding the Fourth Proportional to 86,991.13, 120,115.61 and 66,816.06
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Solution
The fourth proportional to 86,991.13, 120,115.61 and 66,816.06 is: 92,258.28
Step by Step Solution
- Step 1: Write the proportion equation
86,991.13 : 120,115.61 = 66,816.06 : x - Step 2: Convert to fraction form
86,991.13/120,115.61 = 66,816.06/x - Step 3: Cross multiply
86,991.13x = 120,115.61 × 66,816.06 - Step 4: Simplify right side
86,991.13x = 8,025,651,804.70 - Step 5: Solve for x
x = 8,025,651,804.70/86,991.13 - Step 6: Final answer
x = 92,258.28
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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.