Finding the Fourth Proportional to 128,781,726.20, 193,396,538.10 and 68,315,550.20
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Solution
The fourth proportional to 128,781,726.20, 193,396,538.10 and 68,315,550.20 is: 102,592,124.65
Step by Step Solution
- Step 1: Write the proportion equation
128,781,726.20 : 193,396,538.10 = 68,315,550.20 : x - Step 2: Convert to fraction form
128,781,726.20/193,396,538.10 = 68,315,550.20/x - Step 3: Cross multiply
128,781,726.20x = 193,396,538.10 × 68,315,550.20 - Step 4: Simplify right side
128,781,726.20x = 13,211,990,907,076,762 - Step 5: Solve for x
x = 13,211,990,907,076,762/128,781,726.20 - Step 6: Final answer
x = 102,592,124.65
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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.