Finding the Fourth Proportional to 128,312.20, 192,468.30 and 115,481.80
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Solution
The fourth proportional to 128,312.20, 192,468.30 and 115,481.80 is: 173,222.70
Step by Step Solution
- Step 1: Write the proportion equation
128,312.20 : 192,468.30 = 115,481.80 : x - Step 2: Convert to fraction form
128,312.20/192,468.30 = 115,481.80/x - Step 3: Cross multiply
128,312.20x = 192,468.30 × 115,481.80 - Step 4: Simplify right side
128,312.20x = 22,226,585,726.94 - Step 5: Solve for x
x = 22,226,585,726.94/128,312.20 - Step 6: Final answer
x = 173,222.70
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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.