Finding the Fourth Proportional to 81,199,756.80, 121,813,287.84 and 40,261,216.32
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Solution
The fourth proportional to 81,199,756.80, 121,813,287.84 and 40,261,216.32 is: 60,398,593.86
Step by Step Solution
- Step 1: Write the proportion equation
81,199,756.80 : 121,813,287.84 = 40,261,216.32 : x - Step 2: Convert to fraction form
81,199,756.80/121,813,287.84 = 40,261,216.32/x - Step 3: Cross multiply
81,199,756.80x = 121,813,287.84 × 40,261,216.32 - Step 4: Simplify right side
81,199,756.80x = 4,904,351,132,376,666 - Step 5: Solve for x
x = 4,904,351,132,376,666/81,199,756.80 - Step 6: Final answer
x = 60,398,593.86
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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.