Finding the Fourth Proportional to 128,187.68, 176,902.56 and 70,830.68
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Solution
The fourth proportional to 128,187.68, 176,902.56 and 70,830.68 is: 97,748.31
Step by Step Solution
- Step 1: Write the proportion equation
128,187.68 : 176,902.56 = 70,830.68 : x - Step 2: Convert to fraction form
128,187.68/176,902.56 = 70,830.68/x - Step 3: Cross multiply
128,187.68x = 176,902.56 × 70,830.68 - Step 4: Simplify right side
128,187.68x = 12,530,128,618.54 - Step 5: Solve for x
x = 12,530,128,618.54/128,187.68 - Step 6: Final answer
x = 97,748.31
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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.