Finding the Fourth Proportional to 86,347.80, 129,400.20 and 68,608.80
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Solution
The fourth proportional to 86,347.80, 129,400.20 and 68,608.80 is: 102,816.66
Step by Step Solution
- Step 1: Write the proportion equation
86,347.80 : 129,400.20 = 68,608.80 : x - Step 2: Convert to fraction form
86,347.80/129,400.20 = 68,608.80/x - Step 3: Cross multiply
86,347.80x = 129,400.20 × 68,608.80 - Step 4: Simplify right side
86,347.80x = 8,877,992,441.76 - Step 5: Solve for x
x = 8,877,992,441.76/86,347.80 - Step 6: Final answer
x = 102,816.66
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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.