Finding the Fourth Proportional to 128,209.84, 176,902.18 and 74,467.05
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Solution
The fourth proportional to 128,209.84, 176,902.18 and 74,467.05 is: 102,748.61
Step by Step Solution
- Step 1: Write the proportion equation
128,209.84 : 176,902.18 = 74,467.05 : x - Step 2: Convert to fraction form
128,209.84/176,902.18 = 74,467.05/x - Step 3: Cross multiply
128,209.84x = 176,902.18 × 74,467.05 - Step 4: Simplify right side
128,209.84x = 13,173,382,633.62 - Step 5: Solve for x
x = 13,173,382,633.62/128,209.84 - Step 6: Final answer
x = 102,748.61
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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.