Finding the Fourth Proportional to 78,133.80, 117,201.41 and 18,969.99
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Solution
The fourth proportional to 78,133.80, 117,201.41 and 18,969.99 is: 28,455.16
Step by Step Solution
- Step 1: Write the proportion equation
78,133.80 : 117,201.41 = 18,969.99 : x - Step 2: Convert to fraction form
78,133.80/117,201.41 = 18,969.99/x - Step 3: Cross multiply
78,133.80x = 117,201.41 × 18,969.99 - Step 4: Simplify right side
78,133.80x = 2,223,309,575.69 - Step 5: Solve for x
x = 2,223,309,575.69/78,133.80 - Step 6: Final answer
x = 28,455.16
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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.