Finding the Fourth Proportional to 221,443,378.12, 305,585,941.14 and 122,321,992.20
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Solution
The fourth proportional to 221,443,378.12, 305,585,941.14 and 122,321,992.20 is: 168,801,078.75
Step by Step Solution
- Step 1: Write the proportion equation
221,443,378.12 : 305,585,941.14 = 122,321,992.20 : x - Step 2: Convert to fraction form
221,443,378.12/305,585,941.14 = 122,321,992.20/x - Step 3: Cross multiply
221,443,378.12x = 305,585,941.14 × 122,321,992.20 - Step 4: Simplify right side
221,443,378.12x = 37,379,881,108,556,736 - Step 5: Solve for x
x = 37,379,881,108,556,736/221,443,378.12 - Step 6: Final answer
x = 168,801,078.75
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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.