Finding the Fourth Proportional to 128,203,800.30, 192,305,700.45 and 115,438,718.70
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Solution
The fourth proportional to 128,203,800.30, 192,305,700.45 and 115,438,718.70 is: 173,158,078.05
Step by Step Solution
- Step 1: Write the proportion equation
128,203,800.30 : 192,305,700.45 = 115,438,718.70 : x - Step 2: Convert to fraction form
128,203,800.30/192,305,700.45 = 115,438,718.70/x - Step 3: Cross multiply
128,203,800.30x = 192,305,700.45 × 115,438,718.70 - Step 4: Simplify right side
128,203,800.30x = 22,199,523,658,654,012 - Step 5: Solve for x
x = 22,199,523,658,654,012/128,203,800.30 - Step 6: Final answer
x = 173,158,078.05
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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.