Finding the Fourth Proportional to 128,153.07, 176,838.12 and 74,449.44
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Solution
The fourth proportional to 128,153.07, 176,838.12 and 74,449.44 is: 102,732.61
Step by Step Solution
- Step 1: Write the proportion equation
128,153.07 : 176,838.12 = 74,449.44 : x - Step 2: Convert to fraction form
128,153.07/176,838.12 = 74,449.44/x - Step 3: Cross multiply
128,153.07x = 176,838.12 × 74,449.44 - Step 4: Simplify right side
128,153.07x = 13,165,499,004.65 - Step 5: Solve for x
x = 13,165,499,004.65/128,153.07 - Step 6: Final answer
x = 102,732.61
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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.