Finding the Fourth Proportional to 72,879.36, 109,317.12 and 20,292.48
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Solution
The fourth proportional to 72,879.36, 109,317.12 and 20,292.48 is: 30,438.19
Step by Step Solution
- Step 1: Write the proportion equation
72,879.36 : 109,317.12 = 20,292.48 : x - Step 2: Convert to fraction form
72,879.36/109,317.12 = 20,292.48/x - Step 3: Cross multiply
72,879.36x = 109,317.12 × 20,292.48 - Step 4: Simplify right side
72,879.36x = 2,218,315,471.26 - Step 5: Solve for x
x = 2,218,315,471.26/72,879.36 - Step 6: Final answer
x = 30,438.19
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1.5x scale
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.