Finding the Fourth Proportional to 128,257.84, 176,995.68 and 71,669.20
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Solution
The fourth proportional to 128,257.84, 176,995.68 and 71,669.20 is: 98,903.42
Step by Step Solution
- Step 1: Write the proportion equation
128,257.84 : 176,995.68 = 71,669.20 : x - Step 2: Convert to fraction form
128,257.84/176,995.68 = 71,669.20/x - Step 3: Cross multiply
128,257.84x = 176,995.68 × 71,669.20 - Step 4: Simplify right side
128,257.84x = 12,685,138,789.06 - Step 5: Solve for x
x = 12,685,138,789.06/128,257.84 - Step 6: Final answer
x = 98,903.42
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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.