Finding the Fourth Proportional to 128,072.16, 176,723.28 and 71,485.92
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Solution
The fourth proportional to 128,072.16, 176,723.28 and 71,485.92 is: 98,641.47
Step by Step Solution
- Step 1: Write the proportion equation
128,072.16 : 176,723.28 = 71,485.92 : x - Step 2: Convert to fraction form
128,072.16/176,723.28 = 71,485.92/x - Step 3: Cross multiply
128,072.16x = 176,723.28 × 71,485.92 - Step 4: Simplify right side
128,072.16x = 12,633,226,256.22 - Step 5: Solve for x
x = 12,633,226,256.22/128,072.16 - Step 6: Final answer
x = 98,641.47
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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.