Finding the Fourth Proportional to 138,159.40, 207,239.10 and 49,415.80
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Solution
The fourth proportional to 138,159.40, 207,239.10 and 49,415.80 is: 74,123.70
Step by Step Solution
- Step 1: Write the proportion equation
138,159.40 : 207,239.10 = 49,415.80 : x - Step 2: Convert to fraction form
138,159.40/207,239.10 = 49,415.80/x - Step 3: Cross multiply
138,159.40x = 207,239.10 × 49,415.80 - Step 4: Simplify right side
138,159.40x = 10,240,885,917.78 - Step 5: Solve for x
x = 10,240,885,917.78/138,159.40 - Step 6: Final answer
x = 74,123.70
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1.5x scale
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.