Finding the Fourth Proportional to 68,778.91, 103,165.93 and 18,858.20
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Solution
The fourth proportional to 68,778.91, 103,165.93 and 18,858.20 is: 28,286.63
Step by Step Solution
- Step 1: Write the proportion equation
68,778.91 : 103,165.93 = 18,858.20 : x - Step 2: Convert to fraction form
68,778.91/103,165.93 = 18,858.20/x - Step 3: Cross multiply
68,778.91x = 103,165.93 × 18,858.20 - Step 4: Simplify right side
68,778.91x = 1,945,523,741.13 - Step 5: Solve for x
x = 1,945,523,741.13/68,778.91 - Step 6: Final answer
x = 28,286.63
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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.