Finding the Fourth Proportional to 128,187.84, 176,882.40 and 71,590.08
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Solution
The fourth proportional to 128,187.84, 176,882.40 and 71,590.08 is: 98,784.92
Step by Step Solution
- Step 1: Write the proportion equation
128,187.84 : 176,882.40 = 71,590.08 : x - Step 2: Convert to fraction form
128,187.84/176,882.40 = 71,590.08/x - Step 3: Cross multiply
128,187.84x = 176,882.40 × 71,590.08 - Step 4: Simplify right side
128,187.84x = 12,663,025,166.59 - Step 5: Solve for x
x = 12,663,025,166.59/128,187.84 - Step 6: Final answer
x = 98,784.92
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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.