Finding the Fourth Proportional to 100,178.81, 138,246.76 and 57,740.08
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Solution
The fourth proportional to 100,178.81, 138,246.76 and 57,740.08 is: 79,681.31
Step by Step Solution
- Step 1: Write the proportion equation
100,178.81 : 138,246.76 = 57,740.08 : x - Step 2: Convert to fraction form
100,178.81/138,246.76 = 57,740.08/x - Step 3: Cross multiply
100,178.81x = 138,246.76 × 57,740.08 - Step 4: Simplify right side
100,178.81x = 7,982,378,708.70 - Step 5: Solve for x
x = 7,982,378,708.70/100,178.81 - Step 6: Final answer
x = 79,681.31
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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.