Finding the Fourth Proportional to 121,640,816.19, 167,729,771.48 and 77,517,874.11
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Solution
The fourth proportional to 121,640,816.19, 167,729,771.48 and 77,517,874.11 is: 106,888,918.68
Step by Step Solution
- Step 1: Write the proportion equation
121,640,816.19 : 167,729,771.48 = 77,517,874.11 : x - Step 2: Convert to fraction form
121,640,816.19/167,729,771.48 = 77,517,874.11/x - Step 3: Cross multiply
121,640,816.19x = 167,729,771.48 × 77,517,874.11 - Step 4: Simplify right side
121,640,816.19x = 13,002,055,309,698,118 - Step 5: Solve for x
x = 13,002,055,309,698,118/121,640,816.19 - Step 6: Final answer
x = 106,888,918.68
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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.