Finding the Fourth Proportional to 90,912.62, 125,438.28 and 55,094.78
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Solution
The fourth proportional to 90,912.62, 125,438.28 and 55,094.78 is: 76,017.99
Step by Step Solution
- Step 1: Write the proportion equation
90,912.62 : 125,438.28 = 55,094.78 : x - Step 2: Convert to fraction form
90,912.62/125,438.28 = 55,094.78/x - Step 3: Cross multiply
90,912.62x = 125,438.28 × 55,094.78 - Step 4: Simplify right side
90,912.62x = 6,910,994,440.18 - Step 5: Solve for x
x = 6,910,994,440.18/90,912.62 - Step 6: Final answer
x = 76,017.99
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1.5x scale
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.