Finding the Fourth Proportional to 75,615.70, 113,423.55 and 20,211.70
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Solution
The fourth proportional to 75,615.70, 113,423.55 and 20,211.70 is: 30,317.55
Step by Step Solution
- Step 1: Write the proportion equation
75,615.70 : 113,423.55 = 20,211.70 : x - Step 2: Convert to fraction form
75,615.70/113,423.55 = 20,211.70/x - Step 3: Cross multiply
75,615.70x = 113,423.55 × 20,211.70 - Step 4: Simplify right side
75,615.70x = 2,292,482,765.54 - Step 5: Solve for x
x = 2,292,482,765.54/75,615.70 - Step 6: Final answer
x = 30,317.55
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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.