Finding the Fourth Proportional to 128,257.77, 176,992.09 and 71,669.14
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Solution
The fourth proportional to 128,257.77, 176,992.09 and 71,669.14 is: 98,901.38
Step by Step Solution
- Step 1: Write the proportion equation
128,257.77 : 176,992.09 = 71,669.14 : x - Step 2: Convert to fraction form
128,257.77/176,992.09 = 71,669.14/x - Step 3: Cross multiply
128,257.77x = 176,992.09 × 71,669.14 - Step 4: Simplify right side
128,257.77x = 12,684,870,877.10 - Step 5: Solve for x
x = 12,684,870,877.10/128,257.77 - Step 6: Final answer
x = 98,901.38
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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.