Finding the Fourth Proportional to 78,113.81, 107,796.48 and 42,302.99
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Solution
The fourth proportional to 78,113.81, 107,796.48 and 42,302.99 is: 58,377.81
Step by Step Solution
- Step 1: Write the proportion equation
78,113.81 : 107,796.48 = 42,302.99 : x - Step 2: Convert to fraction form
78,113.81/107,796.48 = 42,302.99/x - Step 3: Cross multiply
78,113.81x = 107,796.48 × 42,302.99 - Step 4: Simplify right side
78,113.81x = 4,560,112,876.49 - Step 5: Solve for x
x = 4,560,112,876.49/78,113.81 - Step 6: Final answer
x = 58,377.81
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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.