Finding the Fourth Proportional to 138,254,447.42, 190,796,933.67 and 79,517,128.94
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Solution
The fourth proportional to 138,254,447.42, 190,796,933.67 and 79,517,128.94 is: 109,736,971.64
Step by Step Solution
- Step 1: Write the proportion equation
138,254,447.42 : 190,796,933.67 = 79,517,128.94 : x - Step 2: Convert to fraction form
138,254,447.42/190,796,933.67 = 79,517,128.94/x - Step 3: Cross multiply
138,254,447.42x = 190,796,933.67 × 79,517,128.94 - Step 4: Simplify right side
138,254,447.42x = 15,171,624,375,994,016 - Step 5: Solve for x
x = 15,171,624,375,994,016/138,254,447.42 - Step 6: Final answer
x = 109,736,971.64
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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.