Finding the Fourth Proportional to 78,107.79, 107,788.22 and 42,296.99
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Solution
The fourth proportional to 78,107.79, 107,788.22 and 42,296.99 is: 58,369.55
Step by Step Solution
- Step 1: Write the proportion equation
78,107.79 : 107,788.22 = 42,296.99 : x - Step 2: Convert to fraction form
78,107.79/107,788.22 = 42,296.99/x - Step 3: Cross multiply
78,107.79x = 107,788.22 × 42,296.99 - Step 4: Simplify right side
78,107.79x = 4,559,116,671.65 - Step 5: Solve for x
x = 4,559,116,671.65/78,107.79 - Step 6: Final answer
x = 58,369.55
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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.