Finding the Fourth Proportional to 118,139.76, 162,991.98 and 75,721.68
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Solution
The fourth proportional to 118,139.76, 162,991.98 and 75,721.68 is: 104,469.71
Step by Step Solution
- Step 1: Write the proportion equation
118,139.76 : 162,991.98 = 75,721.68 : x - Step 2: Convert to fraction form
118,139.76/162,991.98 = 75,721.68/x - Step 3: Cross multiply
118,139.76x = 162,991.98 × 75,721.68 - Step 4: Simplify right side
118,139.76x = 12,342,026,552.13 - Step 5: Solve for x
x = 12,342,026,552.13/118,139.76 - Step 6: Final answer
x = 104,469.71
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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.