Finding the Fourth Proportional to 75,611.75, 113,417.64 and 20,207.75
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Solution
The fourth proportional to 75,611.75, 113,417.64 and 20,207.75 is: 30,311.63
Step by Step Solution
- Step 1: Write the proportion equation
75,611.75 : 113,417.64 = 20,207.75 : x - Step 2: Convert to fraction form
75,611.75/113,417.64 = 20,207.75/x - Step 3: Cross multiply
75,611.75x = 113,417.64 × 20,207.75 - Step 4: Simplify right side
75,611.75x = 2,291,915,314.71 - Step 5: Solve for x
x = 2,291,915,314.71/75,611.75 - Step 6: Final answer
x = 30,311.63
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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.