Finding the Fourth Proportional to 144,292,391.74, 199,118,165.97 and 78,211,471.20
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Solution
The fourth proportional to 144,292,391.74, 199,118,165.97 and 78,211,471.20 is: 107,928,938.70
Step by Step Solution
- Step 1: Write the proportion equation
144,292,391.74 : 199,118,165.97 = 78,211,471.20 : x - Step 2: Convert to fraction form
144,292,391.74/199,118,165.97 = 78,211,471.20/x - Step 3: Cross multiply
144,292,391.74x = 199,118,165.97 × 78,211,471.20 - Step 4: Simplify right side
144,292,391.74x = 15,573,324,703,159,476 - Step 5: Solve for x
x = 15,573,324,703,159,476/144,292,391.74 - Step 6: Final answer
x = 107,928,938.70
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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.