Finding the Fourth Proportional to 87,991.90, 121,428.08 and 49,758.95
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Solution
The fourth proportional to 87,991.90, 121,428.08 and 49,758.95 is: 68,666.94
Step by Step Solution
- Step 1: Write the proportion equation
87,991.90 : 121,428.08 = 49,758.95 : x - Step 2: Convert to fraction form
87,991.90/121,428.08 = 49,758.95/x - Step 3: Cross multiply
87,991.90x = 121,428.08 × 49,758.95 - Step 4: Simplify right side
87,991.90x = 6,042,134,008.25 - Step 5: Solve for x
x = 6,042,134,008.25/87,991.90 - Step 6: Final answer
x = 68,666.94
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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.