Finding the Fourth Proportional to 172,721.32, 258,829.99 and 76,542.53
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Solution
The fourth proportional to 172,721.32, 258,829.99 and 76,542.53 is: 114,702.12
Step by Step Solution
- Step 1: Write the proportion equation
172,721.32 : 258,829.99 = 76,542.53 : x - Step 2: Convert to fraction form
172,721.32/258,829.99 = 76,542.53/x - Step 3: Cross multiply
172,721.32x = 258,829.99 × 76,542.53 - Step 4: Simplify right side
172,721.32x = 19,811,500,788.97 - Step 5: Solve for x
x = 19,811,500,788.97/172,721.32 - Step 6: Final answer
x = 114,702.12
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.