Finding the Fourth Proportional to 128,079.68, 176,732.88 and 74,364.08
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Solution
The fourth proportional to 128,079.68, 176,732.88 and 74,364.08 is: 102,612.51
Step by Step Solution
- Step 1: Write the proportion equation
128,079.68 : 176,732.88 = 74,364.08 : x - Step 2: Convert to fraction form
128,079.68/176,732.88 = 74,364.08/x - Step 3: Cross multiply
128,079.68x = 176,732.88 × 74,364.08 - Step 4: Simplify right side
128,079.68x = 13,142,578,026.95 - Step 5: Solve for x
x = 13,142,578,026.95/128,079.68 - Step 6: Final answer
x = 102,612.51
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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.