Finding the Fourth Proportional to 81,664,669.80, 122,497,004.70 and 51,431,581.80
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Solution
The fourth proportional to 81,664,669.80, 122,497,004.70 and 51,431,581.80 is: 77,147,372.70
Step by Step Solution
- Step 1: Write the proportion equation
81,664,669.80 : 122,497,004.70 = 51,431,581.80 : x - Step 2: Convert to fraction form
81,664,669.80/122,497,004.70 = 51,431,581.80/x - Step 3: Cross multiply
81,664,669.80x = 122,497,004.70 × 51,431,581.80 - Step 4: Simplify right side
81,664,669.80x = 6,300,214,717,483,034 - Step 5: Solve for x
x = 6,300,214,717,483,034/81,664,669.80 - Step 6: Final answer
x = 77,147,372.70
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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.