Finding the Fourth Proportional to 128,060.68, 176,706.64 and 74,345.08
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Solution
The fourth proportional to 128,060.68, 176,706.64 and 74,345.08 is: 102,586.28
Step by Step Solution
- Step 1: Write the proportion equation
128,060.68 : 176,706.64 = 74,345.08 : x - Step 2: Convert to fraction form
128,060.68/176,706.64 = 74,345.08/x - Step 3: Cross multiply
128,060.68x = 176,706.64 × 74,345.08 - Step 4: Simplify right side
128,060.68x = 13,137,269,287.33 - Step 5: Solve for x
x = 13,137,269,287.33/128,060.68 - Step 6: Final answer
x = 102,586.28
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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.