Finding the Fourth Proportional to 121,564.76, 167,677.44 and 105,621.80
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Solution
The fourth proportional to 121,564.76, 167,677.44 and 105,621.80 is: 145,686.90
Step by Step Solution
- Step 1: Write the proportion equation
121,564.76 : 167,677.44 = 105,621.80 : x - Step 2: Convert to fraction form
121,564.76/167,677.44 = 105,621.80/x - Step 3: Cross multiply
121,564.76x = 167,677.44 × 105,621.80 - Step 4: Simplify right side
121,564.76x = 17,710,393,032.19 - Step 5: Solve for x
x = 17,710,393,032.19/121,564.76 - Step 6: Final answer
x = 145,686.90
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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.