Finding the Fourth Proportional to 78,108.79, 107,789.60 and 42,297.99
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Solution
The fourth proportional to 78,108.79, 107,789.60 and 42,297.99 is: 58,370.94
Step by Step Solution
- Step 1: Write the proportion equation
78,108.79 : 107,789.60 = 42,297.99 : x - Step 2: Convert to fraction form
78,108.79/107,789.60 = 42,297.99/x - Step 3: Cross multiply
78,108.79x = 107,789.60 × 42,297.99 - Step 4: Simplify right side
78,108.79x = 4,559,283,422.90 - Step 5: Solve for x
x = 4,559,283,422.90/78,108.79 - Step 6: Final answer
x = 58,370.94
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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.