Finding the Fourth Proportional to 121,854.93, 167,994.45 and 85,506.99
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Solution
The fourth proportional to 121,854.93, 167,994.45 and 85,506.99 is: 117,883.62
Step by Step Solution
- Step 1: Write the proportion equation
121,854.93 : 167,994.45 = 85,506.99 : x - Step 2: Convert to fraction form
121,854.93/167,994.45 = 85,506.99/x - Step 3: Cross multiply
121,854.93x = 167,994.45 × 85,506.99 - Step 4: Simplify right side
121,854.93x = 14,364,699,756.21 - Step 5: Solve for x
x = 14,364,699,756.21/121,854.93 - Step 6: Final answer
x = 117,883.62
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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.