Finding the Fourth Proportional to 139,959,343.49, 193,143,977.16 and 78,079,682.12
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Solution
The fourth proportional to 139,959,343.49, 193,143,977.16 and 78,079,682.12 is: 107,750,007.71
Step by Step Solution
- Step 1: Write the proportion equation
139,959,343.49 : 193,143,977.16 = 78,079,682.12 : x - Step 2: Convert to fraction form
139,959,343.49/193,143,977.16 = 78,079,682.12/x - Step 3: Cross multiply
139,959,343.49x = 193,143,977.16 × 78,079,682.12 - Step 4: Simplify right side
139,959,343.49x = 15,080,620,340,045,342 - Step 5: Solve for x
x = 15,080,620,340,045,342/139,959,343.49 - Step 6: Final answer
x = 107,750,007.71
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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.