Finding the Fourth Proportional to 121,920.58, 168,157.38 and 104,952.70
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Solution
The fourth proportional to 121,920.58, 168,157.38 and 104,952.70 is: 144,754.65
Step by Step Solution
- Step 1: Write the proportion equation
121,920.58 : 168,157.38 = 104,952.70 : x - Step 2: Convert to fraction form
121,920.58/168,157.38 = 104,952.70/x - Step 3: Cross multiply
121,920.58x = 168,157.38 × 104,952.70 - Step 4: Simplify right side
121,920.58x = 17,648,571,055.93 - Step 5: Solve for x
x = 17,648,571,055.93/121,920.58 - Step 6: Final answer
x = 144,754.65
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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.