Finding the Fourth Proportional to 90,428,431.05, 135,516,982.92 and 47,211,427.50
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Solution
The fourth proportional to 90,428,431.05, 135,516,982.92 and 47,211,427.50 is: 70,751,533.99
Step by Step Solution
- Step 1: Write the proportion equation
90,428,431.05 : 135,516,982.92 = 47,211,427.50 : x - Step 2: Convert to fraction form
90,428,431.05/135,516,982.92 = 47,211,427.50/x - Step 3: Cross multiply
90,428,431.05x = 135,516,982.92 × 47,211,427.50 - Step 4: Simplify right side
90,428,431.05x = 6,397,950,213,461,087 - Step 5: Solve for x
x = 6,397,950,213,461,087/90,428,431.05 - Step 6: Final answer
x = 70,751,533.99
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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.