Finding the Fourth Proportional to 128,491.24, 177,284.28 and 74,030.08
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Solution
The fourth proportional to 128,491.24, 177,284.28 and 74,030.08 is: 102,142.13
Step by Step Solution
- Step 1: Write the proportion equation
128,491.24 : 177,284.28 = 74,030.08 : x - Step 2: Convert to fraction form
128,491.24/177,284.28 = 74,030.08/x - Step 3: Cross multiply
128,491.24x = 177,284.28 × 74,030.08 - Step 4: Simplify right side
128,491.24x = 13,124,369,431.14 - Step 5: Solve for x
x = 13,124,369,431.14/128,491.24 - Step 6: Final answer
x = 102,142.13
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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.