Finding the Fourth Proportional to 77,428.53, 106,868.43 and 49,128.75
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Solution
The fourth proportional to 77,428.53, 106,868.43 and 49,128.75 is: 67,808.50
Step by Step Solution
- Step 1: Write the proportion equation
77,428.53 : 106,868.43 = 49,128.75 : x - Step 2: Convert to fraction form
77,428.53/106,868.43 = 49,128.75/x - Step 3: Cross multiply
77,428.53x = 106,868.43 × 49,128.75 - Step 4: Simplify right side
77,428.53x = 5,250,312,380.36 - Step 5: Solve for x
x = 5,250,312,380.36/77,428.53 - Step 6: Final answer
x = 67,808.50
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1.5x scale
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.