Finding the Fourth Proportional to 77,958.42, 107,631.81 and 54,076.74
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Solution
The fourth proportional to 77,958.42, 107,631.81 and 54,076.74 is: 74,660.02
Step by Step Solution
- Step 1: Write the proportion equation
77,958.42 : 107,631.81 = 54,076.74 : x - Step 2: Convert to fraction form
77,958.42/107,631.81 = 54,076.74/x - Step 3: Cross multiply
77,958.42x = 107,631.81 × 54,076.74 - Step 4: Simplify right side
77,958.42x = 5,820,377,405.10 - Step 5: Solve for x
x = 5,820,377,405.10/77,958.42 - Step 6: Final answer
x = 74,660.02
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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.