Finding the Fourth Proportional to 138,823.10, 207,943.05 and 76,420.70
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Solution
The fourth proportional to 138,823.10, 207,943.05 and 76,420.70 is: 114,470.53
Step by Step Solution
- Step 1: Write the proportion equation
138,823.10 : 207,943.05 = 76,420.70 : x - Step 2: Convert to fraction form
138,823.10/207,943.05 = 76,420.70/x - Step 3: Cross multiply
138,823.10x = 207,943.05 × 76,420.70 - Step 4: Simplify right side
138,823.10x = 15,891,153,441.14 - Step 5: Solve for x
x = 15,891,153,441.14/138,823.10 - Step 6: Final answer
x = 114,470.53
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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.