Finding the Fourth Proportional to 128,129.04, 176,767.92 and 74,404.17
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Solution
The fourth proportional to 128,129.04, 176,767.92 and 74,404.17 is: 102,648.63
Step by Step Solution
- Step 1: Write the proportion equation
128,129.04 : 176,767.92 = 74,404.17 : x - Step 2: Convert to fraction form
128,129.04/176,767.92 = 74,404.17/x - Step 3: Cross multiply
128,129.04x = 176,767.92 × 74,404.17 - Step 4: Simplify right side
128,129.04x = 13,152,270,370.23 - Step 5: Solve for x
x = 13,152,270,370.23/128,129.04 - Step 6: Final answer
x = 102,648.63
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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.