Finding the Fourth Proportional to 138,164,820.80, 207,247,231.20 and 42,414,267.20
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Solution
The fourth proportional to 138,164,820.80, 207,247,231.20 and 42,414,267.20 is: 63,621,400.80
Step by Step Solution
- Step 1: Write the proportion equation
138,164,820.80 : 207,247,231.20 = 42,414,267.20 : x - Step 2: Convert to fraction form
138,164,820.80/207,247,231.20 = 42,414,267.20/x - Step 3: Cross multiply
138,164,820.80x = 207,247,231.20 × 42,414,267.20 - Step 4: Simplify right side
138,164,820.80x = 8,790,239,440,576,977 - Step 5: Solve for x
x = 8,790,239,440,576,977/138,164,820.80 - Step 6: Final answer
x = 63,621,400.80
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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.