Finding the Fourth Proportional to 81,638,698.72, 122,458,216.56 and 76,650,239.20
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Solution
The fourth proportional to 81,638,698.72, 122,458,216.56 and 76,650,239.20 is: 114,975,516.99
Step by Step Solution
- Step 1: Write the proportion equation
81,638,698.72 : 122,458,216.56 = 76,650,239.20 : x - Step 2: Convert to fraction form
81,638,698.72/122,458,216.56 = 76,650,239.20/x - Step 3: Cross multiply
81,638,698.72x = 122,458,216.56 × 76,650,239.20 - Step 4: Simplify right side
81,638,698.72x = 9,386,451,591,329,402 - Step 5: Solve for x
x = 9,386,451,591,329,402/81,638,698.72 - Step 6: Final answer
x = 114,975,516.99
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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.