Finding the Fourth Proportional to 7,128,128.80, 10,690,119.60 and 3,934,784.80
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Solution
The fourth proportional to 7,128,128.80, 10,690,119.60 and 3,934,784.80 is: 5,901,032.56
Step by Step Solution
- Step 1: Write the proportion equation
7,128,128.80 : 10,690,119.60 = 3,934,784.80 : x - Step 2: Convert to fraction form
7,128,128.80/10,690,119.60 = 3,934,784.80/x - Step 3: Cross multiply
7,128,128.80x = 10,690,119.60 × 3,934,784.80 - Step 4: Simplify right side
7,128,128.80x = 42,063,320,112,262.08 - Step 5: Solve for x
x = 42,063,320,112,262.08/7,128,128.80 - Step 6: Final answer
x = 5,901,032.56
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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.