Finding the Fourth Proportional to 128,070.29, 176,720.69 and 71,484.05
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Solution
The fourth proportional to 128,070.29, 176,720.69 and 71,484.05 is: 98,638.88
Step by Step Solution
- Step 1: Write the proportion equation
128,070.29 : 176,720.69 = 71,484.05 : x - Step 2: Convert to fraction form
128,070.29/176,720.69 = 71,484.05/x - Step 3: Cross multiply
128,070.29x = 176,720.69 × 71,484.05 - Step 4: Simplify right side
128,070.29x = 12,632,709,398.97 - Step 5: Solve for x
x = 12,632,709,398.97/128,070.29 - Step 6: Final answer
x = 98,638.88
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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.