Finding the Fourth Proportional to 107,934.40, 161,728.80 and 68,420.80
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Solution
The fourth proportional to 107,934.40, 161,728.80 and 68,420.80 is: 102,521.66
Step by Step Solution
- Step 1: Write the proportion equation
107,934.40 : 161,728.80 = 68,420.80 : x - Step 2: Convert to fraction form
107,934.40/161,728.80 = 68,420.80/x - Step 3: Cross multiply
107,934.40x = 161,728.80 × 68,420.80 - Step 4: Simplify right side
107,934.40x = 11,065,613,879.04 - Step 5: Solve for x
x = 11,065,613,879.04/107,934.40 - Step 6: Final answer
x = 102,521.66
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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.