Finding the Fourth Proportional to 139,554.25, 192,579.03 and 79,128.99
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Solution
The fourth proportional to 139,554.25, 192,579.03 and 79,128.99 is: 109,194.70
Step by Step Solution
- Step 1: Write the proportion equation
139,554.25 : 192,579.03 = 79,128.99 : x - Step 2: Convert to fraction form
139,554.25/192,579.03 = 79,128.99/x - Step 3: Cross multiply
139,554.25x = 192,579.03 × 79,128.99 - Step 4: Simplify right side
139,554.25x = 15,238,584,139.08 - Step 5: Solve for x
x = 15,238,584,139.08/139,554.25 - Step 6: Final answer
x = 109,194.70
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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.