Finding the Fourth Proportional to 79,138.86, 109,207.44 and 43,321.94
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Solution
The fourth proportional to 79,138.86, 109,207.44 and 43,321.94 is: 59,781.99
Step by Step Solution
- Step 1: Write the proportion equation
79,138.86 : 109,207.44 = 43,321.94 : x - Step 2: Convert to fraction form
79,138.86/109,207.44 = 43,321.94/x - Step 3: Cross multiply
79,138.86x = 109,207.44 × 43,321.94 - Step 4: Simplify right side
79,138.86x = 4,731,078,163.23 - Step 5: Solve for x
x = 4,731,078,163.23/79,138.86 - Step 6: Final answer
x = 59,781.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.