Finding the Fourth Proportional to 68,910.80, 103,369.73 and 18,989.79
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Solution
The fourth proportional to 68,910.80, 103,369.73 and 18,989.79 is: 28,485.66
Step by Step Solution
- Step 1: Write the proportion equation
68,910.80 : 103,369.73 = 18,989.79 : x - Step 2: Convert to fraction form
68,910.80/103,369.73 = 18,989.79/x - Step 3: Cross multiply
68,910.80x = 103,369.73 × 18,989.79 - Step 4: Simplify right side
68,910.80x = 1,962,969,465.06 - Step 5: Solve for x
x = 1,962,969,465.06/68,910.80 - Step 6: Final answer
x = 28,485.66
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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.