Finding the Fourth Proportional to 128,344.74, 177,044.64 and 74,623.82
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Solution
The fourth proportional to 128,344.74, 177,044.64 and 74,623.82 is: 102,939.53
Step by Step Solution
- Step 1: Write the proportion equation
128,344.74 : 177,044.64 = 74,623.82 : x - Step 2: Convert to fraction form
128,344.74/177,044.64 = 74,623.82/x - Step 3: Cross multiply
128,344.74x = 177,044.64 × 74,623.82 - Step 4: Simplify right side
128,344.74x = 13,211,747,347.32 - Step 5: Solve for x
x = 13,211,747,347.32/128,344.74 - Step 6: Final answer
x = 102,939.53
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1.5x scale
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.