Finding the Fourth Proportional to 128,108.30, 192,279.06 and 68,187.08
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Solution
The fourth proportional to 128,108.30, 192,279.06 and 68,187.08 is: 102,342.68
Step by Step Solution
- Step 1: Write the proportion equation
128,108.30 : 192,279.06 = 68,187.08 : x - Step 2: Convert to fraction form
128,108.30/192,279.06 = 68,187.08/x - Step 3: Cross multiply
128,108.30x = 192,279.06 × 68,187.08 - Step 4: Simplify right side
128,108.30x = 13,110,946,344.21 - Step 5: Solve for x
x = 13,110,946,344.21/128,108.30 - Step 6: Final answer
x = 102,342.68
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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.