Finding the Fourth Proportional to 66,420,905.20, 99,673,348.20 and 39,127,145.20
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Solution
The fourth proportional to 66,420,905.20, 99,673,348.20 and 39,127,145.20 is: 58,715,453.45
Step by Step Solution
- Step 1: Write the proportion equation
66,420,905.20 : 99,673,348.20 = 39,127,145.20 : x - Step 2: Convert to fraction form
66,420,905.20/99,673,348.20 = 39,127,145.20/x - Step 3: Cross multiply
66,420,905.20x = 99,673,348.20 × 39,127,145.20 - Step 4: Simplify right side
66,420,905.20x = 3,899,933,567,591,559 - Step 5: Solve for x
x = 3,899,933,567,591,559/66,420,905.20 - Step 6: Final answer
x = 58,715,453.45
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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.