Finding the Fourth Proportional to 138,608,020.55, 207,841,969.04 and 81,117,564.23
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Solution
The fourth proportional to 138,608,020.55, 207,841,969.04 and 81,117,564.23 is: 121,635,344.08
Step by Step Solution
- Step 1: Write the proportion equation
138,608,020.55 : 207,841,969.04 = 81,117,564.23 : x - Step 2: Convert to fraction form
138,608,020.55/207,841,969.04 = 81,117,564.23/x - Step 3: Cross multiply
138,608,020.55x = 207,841,969.04 × 81,117,564.23 - Step 4: Simplify right side
138,608,020.55x = 16,859,634,271,847,072 - Step 5: Solve for x
x = 16,859,634,271,847,072/138,608,020.55 - Step 6: Final answer
x = 121,635,344.08
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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.