Finding the Fourth Proportional to 128,644.35, 193,180.37 and 86,793.68
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Solution
The fourth proportional to 128,644.35, 193,180.37 and 86,793.68 is: 130,334.79
Step by Step Solution
- Step 1: Write the proportion equation
128,644.35 : 193,180.37 = 86,793.68 : x - Step 2: Convert to fraction form
128,644.35/193,180.37 = 86,793.68/x - Step 3: Cross multiply
128,644.35x = 193,180.37 × 86,793.68 - Step 4: Simplify right side
128,644.35x = 16,766,833,816.19 - Step 5: Solve for x
x = 16,766,833,816.19/128,644.35 - Step 6: Final answer
x = 130,334.79
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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.