Finding the Fourth Proportional to 149,262.29, 205,978.99 and 81,280.07
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Solution
The fourth proportional to 149,262.29, 205,978.99 and 81,280.07 is: 112,164.88
Step by Step Solution
- Step 1: Write the proportion equation
149,262.29 : 205,978.99 = 81,280.07 : x - Step 2: Convert to fraction form
149,262.29/205,978.99 = 81,280.07/x - Step 3: Cross multiply
149,262.29x = 205,978.99 × 81,280.07 - Step 4: Simplify right side
149,262.29x = 16,741,986,725.73 - Step 5: Solve for x
x = 16,741,986,725.73/149,262.29 - Step 6: Final answer
x = 112,164.88
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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.