Finding the Fourth Proportional to 102,721.88, 141,762.78 and 57,399.99
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Solution
The fourth proportional to 102,721.88, 141,762.78 and 57,399.99 is: 79,215.67
Step by Step Solution
- Step 1: Write the proportion equation
102,721.88 : 141,762.78 = 57,399.99 : x - Step 2: Convert to fraction form
102,721.88/141,762.78 = 57,399.99/x - Step 3: Cross multiply
102,721.88x = 141,762.78 × 57,399.99 - Step 4: Simplify right side
102,721.88x = 8,137,182,154.37 - Step 5: Solve for x
x = 8,137,182,154.37/102,721.88 - Step 6: Final answer
x = 79,215.67
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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.