Finding the Fourth Proportional to 75,475.80, 113,213.70 and 31,079.70
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Solution
The fourth proportional to 75,475.80, 113,213.70 and 31,079.70 is: 46,619.55
Step by Step Solution
- Step 1: Write the proportion equation
75,475.80 : 113,213.70 = 31,079.70 : x - Step 2: Convert to fraction form
75,475.80/113,213.70 = 31,079.70/x - Step 3: Cross multiply
75,475.80x = 113,213.70 × 31,079.70 - Step 4: Simplify right side
75,475.80x = 3,518,647,831.89 - Step 5: Solve for x
x = 3,518,647,831.89/75,475.80 - Step 6: Final answer
x = 46,619.55
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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.