Finding the Fourth Proportional to 78,216.24, 107,938.80 and 75,390.96
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Solution
The fourth proportional to 78,216.24, 107,938.80 and 75,390.96 is: 104,039.90
Step by Step Solution
- Step 1: Write the proportion equation
78,216.24 : 107,938.80 = 75,390.96 : x - Step 2: Convert to fraction form
78,216.24/107,938.80 = 75,390.96/x - Step 3: Cross multiply
78,216.24x = 107,938.80 × 75,390.96 - Step 4: Simplify right side
78,216.24x = 8,137,609,753.25 - Step 5: Solve for x
x = 8,137,609,753.25/78,216.24 - Step 6: Final answer
x = 104,039.90
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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.