Finding the Fourth Proportional to 121,991,651.34, 168,351,404.02 and 66,239,421.62
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Solution
The fourth proportional to 121,991,651.34, 168,351,404.02 and 66,239,421.62 is: 91,411,990.15
Step by Step Solution
- Step 1: Write the proportion equation
121,991,651.34 : 168,351,404.02 = 66,239,421.62 : x - Step 2: Convert to fraction form
121,991,651.34/168,351,404.02 = 66,239,421.62/x - Step 3: Cross multiply
121,991,651.34x = 168,351,404.02 × 66,239,421.62 - Step 4: Simplify right side
121,991,651.34x = 11,151,499,631,199,744 - Step 5: Solve for x
x = 11,151,499,631,199,744/121,991,651.34 - Step 6: Final answer
x = 91,411,990.15
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.