Finding the Fourth Proportional to 77,778.24, 107,349.40 and 50,516.28
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Solution
The fourth proportional to 77,778.24, 107,349.40 and 50,516.28 is: 69,722.49
Step by Step Solution
- Step 1: Write the proportion equation
77,778.24 : 107,349.40 = 50,516.28 : x - Step 2: Convert to fraction form
77,778.24/107,349.40 = 50,516.28/x - Step 3: Cross multiply
77,778.24x = 107,349.40 × 50,516.28 - Step 4: Simplify right side
77,778.24x = 5,422,892,348.23 - Step 5: Solve for x
x = 5,422,892,348.23/77,778.24 - Step 6: Final answer
x = 69,722.49
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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.