Finding the Fourth Proportional to 78,178.99, 107,886.97 and 42,368.99
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Solution
The fourth proportional to 78,178.99, 107,886.97 and 42,368.99 is: 58,469.19
Step by Step Solution
- Step 1: Write the proportion equation
78,178.99 : 107,886.97 = 42,368.99 : x - Step 2: Convert to fraction form
78,178.99/107,886.97 = 42,368.99/x - Step 3: Cross multiply
78,178.99x = 107,886.97 × 42,368.99 - Step 4: Simplify right side
78,178.99x = 4,571,062,073.45 - Step 5: Solve for x
x = 4,571,062,073.45/78,178.99 - Step 6: Final answer
x = 58,469.19
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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.