Finding the Fourth Proportional to 100,562.76, 138,769.74 and 55,242.68
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Solution
The fourth proportional to 100,562.76, 138,769.74 and 55,242.68 is: 76,231.12
Step by Step Solution
- Step 1: Write the proportion equation
100,562.76 : 138,769.74 = 55,242.68 : x - Step 2: Convert to fraction form
100,562.76/138,769.74 = 55,242.68/x - Step 3: Cross multiply
100,562.76x = 138,769.74 × 55,242.68 - Step 4: Simplify right side
100,562.76x = 7,666,011,646.65 - Step 5: Solve for x
x = 7,666,011,646.65/100,562.76 - Step 6: Final answer
x = 76,231.12
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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.