Finding the Fourth Proportional to 250,140,104.22, 345,193,376.58 and 138,638,143.70
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Solution
The fourth proportional to 250,140,104.22, 345,193,376.58 and 138,638,143.70 is: 191,320,656.45
Step by Step Solution
- Step 1: Write the proportion equation
250,140,104.22 : 345,193,376.58 = 138,638,143.70 : x - Step 2: Convert to fraction form
250,140,104.22/345,193,376.58 = 138,638,143.70/x - Step 3: Cross multiply
250,140,104.22x = 345,193,376.58 × 138,638,143.70 - Step 4: Simplify right side
250,140,104.22x = 47,856,968,944,860,280 - Step 5: Solve for x
x = 47,856,968,944,860,280/250,140,104.22 - Step 6: Final answer
x = 191,320,656.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.