Finding the Fourth Proportional to 86,640,367.80, 129,960,551.70 and 84,120,943.80
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Solution
The fourth proportional to 86,640,367.80, 129,960,551.70 and 84,120,943.80 is: 126,181,415.70
Step by Step Solution
- Step 1: Write the proportion equation
86,640,367.80 : 129,960,551.70 = 84,120,943.80 : x - Step 2: Convert to fraction form
86,640,367.80/129,960,551.70 = 84,120,943.80/x - Step 3: Cross multiply
86,640,367.80x = 129,960,551.70 × 84,120,943.80 - Step 4: Simplify right side
86,640,367.80x = 10,932,404,265,772,694 - Step 5: Solve for x
x = 10,932,404,265,772,694/86,640,367.80 - Step 6: Final answer
x = 126,181,415.70
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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.