Finding the Fourth Proportional to 121,991,988.88, 168,351,869.76 and 66,239,758.96
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Solution
The fourth proportional to 121,991,988.88, 168,351,869.76 and 66,239,758.96 is: 91,412,455.65
Step by Step Solution
- Step 1: Write the proportion equation
121,991,988.88 : 168,351,869.76 = 66,239,758.96 : x - Step 2: Convert to fraction form
121,991,988.88/168,351,869.76 = 66,239,758.96/x - Step 3: Cross multiply
121,991,988.88x = 168,351,869.76 × 66,239,758.96 - Step 4: Simplify right side
121,991,988.88x = 11,151,587,273,367,712 - Step 5: Solve for x
x = 11,151,587,273,367,712/121,991,988.88 - Step 6: Final answer
x = 91,412,455.65
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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.