Finding the Fourth Proportional to 77,949.09, 107,485.11 and 49,618.53
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Solution
The fourth proportional to 77,949.09, 107,485.11 and 49,618.53 is: 68,419.70
Step by Step Solution
- Step 1: Write the proportion equation
77,949.09 : 107,485.11 = 49,618.53 : x - Step 2: Convert to fraction form
77,949.09/107,485.11 = 49,618.53/x - Step 3: Cross multiply
77,949.09x = 107,485.11 × 49,618.53 - Step 4: Simplify right side
77,949.09x = 5,333,253,155.09 - Step 5: Solve for x
x = 5,333,253,155.09/77,949.09 - Step 6: Final answer
x = 68,419.70
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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.