Finding the Fourth Proportional to 138,641.58, 207,940.68 and 45,146.70
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Solution
The fourth proportional to 138,641.58, 207,940.68 and 45,146.70 is: 67,712.99
Step by Step Solution
- Step 1: Write the proportion equation
138,641.58 : 207,940.68 = 45,146.70 : x - Step 2: Convert to fraction form
138,641.58/207,940.68 = 45,146.70/x - Step 3: Cross multiply
138,641.58x = 207,940.68 × 45,146.70 - Step 4: Simplify right side
138,641.58x = 9,387,835,497.76 - Step 5: Solve for x
x = 9,387,835,497.76/138,641.58 - Step 6: Final answer
x = 67,712.99
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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.