Finding the Fourth Proportional to 129,017.09, 178,037.66 and 71,660.07
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Solution
The fourth proportional to 129,017.09, 178,037.66 and 71,660.07 is: 98,887.61
Step by Step Solution
- Step 1: Write the proportion equation
129,017.09 : 178,037.66 = 71,660.07 : x - Step 2: Convert to fraction form
129,017.09/178,037.66 = 71,660.07/x - Step 3: Cross multiply
129,017.09x = 178,037.66 × 71,660.07 - Step 4: Simplify right side
129,017.09x = 12,758,190,819.94 - Step 5: Solve for x
x = 12,758,190,819.94/129,017.09 - Step 6: Final answer
x = 98,887.61
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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.