Finding the Fourth Proportional to 128,136.90, 192,205.35 and 115,452.30
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Solution
The fourth proportional to 128,136.90, 192,205.35 and 115,452.30 is: 173,178.45
Step by Step Solution
- Step 1: Write the proportion equation
128,136.90 : 192,205.35 = 115,452.30 : x - Step 2: Convert to fraction form
128,136.90/192,205.35 = 115,452.30/x - Step 3: Cross multiply
128,136.90x = 192,205.35 × 115,452.30 - Step 4: Simplify right side
128,136.90x = 22,190,549,729.81 - Step 5: Solve for x
x = 22,190,549,729.81/128,136.90 - Step 6: Final answer
x = 173,178.45
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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.