Finding the Fourth Proportional to 78,134.16, 117,201.24 and 18,969.92
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Solution
The fourth proportional to 78,134.16, 117,201.24 and 18,969.92 is: 28,454.88
Step by Step Solution
- Step 1: Write the proportion equation
78,134.16 : 117,201.24 = 18,969.92 : x - Step 2: Convert to fraction form
78,134.16/117,201.24 = 18,969.92/x - Step 3: Cross multiply
78,134.16x = 117,201.24 × 18,969.92 - Step 4: Simplify right side
78,134.16x = 2,223,298,146.70 - Step 5: Solve for x
x = 2,223,298,146.70/78,134.16 - Step 6: Final answer
x = 28,454.88
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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.