Finding the Fourth Proportional to 138,245,010.40, 207,367,515.60 and 86,960,735.20
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Solution
The fourth proportional to 138,245,010.40, 207,367,515.60 and 86,960,735.20 is: 130,441,102.80
Step by Step Solution
- Step 1: Write the proportion equation
138,245,010.40 : 207,367,515.60 = 86,960,735.20 : x - Step 2: Convert to fraction form
138,245,010.40/207,367,515.60 = 86,960,735.20/x - Step 3: Cross multiply
138,245,010.40x = 207,367,515.60 × 86,960,735.20 - Step 4: Simplify right side
138,245,010.40x = 18,032,831,613,173,468 - Step 5: Solve for x
x = 18,032,831,613,173,468/138,245,010.40 - Step 6: Final answer
x = 130,441,102.80
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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.