Finding the Fourth Proportional to 78,182.74, 107,889.29 and 42,371.99
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Solution
The fourth proportional to 78,182.74, 107,889.29 and 42,371.99 is: 58,471.77
Step by Step Solution
- Step 1: Write the proportion equation
78,182.74 : 107,889.29 = 42,371.99 : x - Step 2: Convert to fraction form
78,182.74/107,889.29 = 42,371.99/x - Step 3: Cross multiply
78,182.74x = 107,889.29 × 42,371.99 - Step 4: Simplify right side
78,182.74x = 4,571,483,165.68 - Step 5: Solve for x
x = 4,571,483,165.68/78,182.74 - Step 6: Final answer
x = 58,471.77
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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.