Finding the Fourth Proportional to 68,569.85, 102,864.60 and 21,189.08
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Solution
The fourth proportional to 68,569.85, 102,864.60 and 21,189.08 is: 31,786.65
Step by Step Solution
- Step 1: Write the proportion equation
68,569.85 : 102,864.60 = 21,189.08 : x - Step 2: Convert to fraction form
68,569.85/102,864.60 = 21,189.08/x - Step 3: Cross multiply
68,569.85x = 102,864.60 × 21,189.08 - Step 4: Simplify right side
68,569.85x = 2,179,605,917.12 - Step 5: Solve for x
x = 2,179,605,917.12/68,569.85 - Step 6: Final answer
x = 31,786.65
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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.