Finding the Fourth Proportional to 81,302.79, 121,941.86 and 22,143.12
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Solution
The fourth proportional to 81,302.79, 121,941.86 and 22,143.12 is: 33,211.32
Step by Step Solution
- Step 1: Write the proportion equation
81,302.79 : 121,941.86 = 22,143.12 : x - Step 2: Convert to fraction form
81,302.79/121,941.86 = 22,143.12/x - Step 3: Cross multiply
81,302.79x = 121,941.86 × 22,143.12 - Step 4: Simplify right side
81,302.79x = 2,700,173,128.29 - Step 5: Solve for x
x = 2,700,173,128.29/81,302.79 - Step 6: Final answer
x = 33,211.32
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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.