Finding the Fourth Proportional to 78,125.36, 117,178.74 and 20,418.80
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Solution
The fourth proportional to 78,125.36, 117,178.74 and 20,418.80 is: 30,625.77
Step by Step Solution
- Step 1: Write the proportion equation
78,125.36 : 117,178.74 = 20,418.80 : x - Step 2: Convert to fraction form
78,125.36/117,178.74 = 20,418.80/x - Step 3: Cross multiply
78,125.36x = 117,178.74 × 20,418.80 - Step 4: Simplify right side
78,125.36x = 2,392,649,256.31 - Step 5: Solve for x
x = 2,392,649,256.31/78,125.36 - Step 6: Final answer
x = 30,625.77
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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.