Finding the Fourth Proportional to 91,805,987.20, 137,708,980.80 and 79,848,564.70
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Solution
The fourth proportional to 91,805,987.20, 137,708,980.80 and 79,848,564.70 is: 119,772,847.05
Step by Step Solution
- Step 1: Write the proportion equation
91,805,987.20 : 137,708,980.80 = 79,848,564.70 : x - Step 2: Convert to fraction form
91,805,987.20/137,708,980.80 = 79,848,564.70/x - Step 3: Cross multiply
91,805,987.20x = 137,708,980.80 × 79,848,564.70 - Step 4: Simplify right side
91,805,987.20x = 10,995,864,463,179,860 - Step 5: Solve for x
x = 10,995,864,463,179,860/91,805,987.20 - Step 6: Final answer
x = 119,772,847.05
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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.