Finding the Fourth Proportional to 138,729.70, 207,802.95 and 115,401.70
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Solution
The fourth proportional to 138,729.70, 207,802.95 and 115,401.70 is: 172,859.98
Step by Step Solution
- Step 1: Write the proportion equation
138,729.70 : 207,802.95 = 115,401.70 : x - Step 2: Convert to fraction form
138,729.70/207,802.95 = 115,401.70/x - Step 3: Cross multiply
138,729.70x = 207,802.95 × 115,401.70 - Step 4: Simplify right side
138,729.70x = 23,980,813,695.02 - Step 5: Solve for x
x = 23,980,813,695.02/138,729.70 - Step 6: Final answer
x = 172,859.98
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.