Finding the Fourth Proportional to 128,110.05, 192,165.08 and 81,454.05
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Solution
The fourth proportional to 128,110.05, 192,165.08 and 81,454.05 is: 122,181.08
Step by Step Solution
- Step 1: Write the proportion equation
128,110.05 : 192,165.08 = 81,454.05 : x - Step 2: Convert to fraction form
128,110.05/192,165.08 = 81,454.05/x - Step 3: Cross multiply
128,110.05x = 192,165.08 × 81,454.05 - Step 4: Simplify right side
128,110.05x = 15,652,623,627.30 - Step 5: Solve for x
x = 15,652,623,627.30/128,110.05 - Step 6: Final answer
x = 122,181.08
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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.