Finding the Fourth Proportional to 77,621.76, 107,129.66 and 47,424.56
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Solution
The fourth proportional to 77,621.76, 107,129.66 and 47,424.56 is: 65,452.99
Step by Step Solution
- Step 1: Write the proportion equation
77,621.76 : 107,129.66 = 47,424.56 : x - Step 2: Convert to fraction form
77,621.76/107,129.66 = 47,424.56/x - Step 3: Cross multiply
77,621.76x = 107,129.66 × 47,424.56 - Step 4: Simplify right side
77,621.76x = 5,080,576,215.68 - Step 5: Solve for x
x = 5,080,576,215.68/77,621.76 - Step 6: Final answer
x = 65,452.99
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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.