Finding the Fourth Proportional to 77,284.26, 115,907.76 and 21,124.62
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Solution
The fourth proportional to 77,284.26, 115,907.76 and 21,124.62 is: 31,681.84
Step by Step Solution
- Step 1: Write the proportion equation
77,284.26 : 115,907.76 = 21,124.62 : x - Step 2: Convert to fraction form
77,284.26/115,907.76 = 21,124.62/x - Step 3: Cross multiply
77,284.26x = 115,907.76 × 21,124.62 - Step 4: Simplify right side
77,284.26x = 2,448,507,385.05 - Step 5: Solve for x
x = 2,448,507,385.05/77,284.26 - Step 6: Final answer
x = 31,681.84
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.