Finding the Fourth Proportional to 128,572.08, 177,420.57 and 71,207.28
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Solution
The fourth proportional to 128,572.08, 177,420.57 and 71,207.28 is: 98,261.12
Step by Step Solution
- Step 1: Write the proportion equation
128,572.08 : 177,420.57 = 71,207.28 : x - Step 2: Convert to fraction form
128,572.08/177,420.57 = 71,207.28/x - Step 3: Cross multiply
128,572.08x = 177,420.57 × 71,207.28 - Step 4: Simplify right side
128,572.08x = 12,633,636,205.75 - Step 5: Solve for x
x = 12,633,636,205.75/128,572.08 - Step 6: Final answer
x = 98,261.12
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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.