Finding the Fourth Proportional to 87,638.49, 121,040.87 and 58,908.26
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Solution
The fourth proportional to 87,638.49, 121,040.87 and 58,908.26 is: 81,360.45
Step by Step Solution
- Step 1: Write the proportion equation
87,638.49 : 121,040.87 = 58,908.26 : x - Step 2: Convert to fraction form
87,638.49/121,040.87 = 58,908.26/x - Step 3: Cross multiply
87,638.49x = 121,040.87 × 58,908.26 - Step 4: Simplify right side
87,638.49x = 7,130,307,048.65 - Step 5: Solve for x
x = 7,130,307,048.65/87,638.49 - Step 6: Final answer
x = 81,360.45
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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.