Finding the Fourth Proportional to 100,358,969.12, 138,503,724.80 and 55,709,143.68
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Solution
The fourth proportional to 100,358,969.12, 138,503,724.80 and 55,709,143.68 is: 76,883,251.92
Step by Step Solution
- Step 1: Write the proportion equation
100,358,969.12 : 138,503,724.80 = 55,709,143.68 : x - Step 2: Convert to fraction form
100,358,969.12/138,503,724.80 = 55,709,143.68/x - Step 3: Cross multiply
100,358,969.12x = 138,503,724.80 × 55,709,143.68 - Step 4: Simplify right side
100,358,969.12x = 7,715,923,905,098,380 - Step 5: Solve for x
x = 7,715,923,905,098,380/100,358,969.12 - Step 6: Final answer
x = 76,883,251.92
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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.