Finding the Fourth Proportional to 81,128.18, 121,633.95 and 36,732.08
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Solution
The fourth proportional to 81,128.18, 121,633.95 and 36,732.08 is: 55,071.72
Step by Step Solution
- Step 1: Write the proportion equation
81,128.18 : 121,633.95 = 36,732.08 : x - Step 2: Convert to fraction form
81,128.18/121,633.95 = 36,732.08/x - Step 3: Cross multiply
81,128.18x = 121,633.95 × 36,732.08 - Step 4: Simplify right side
81,128.18x = 4,467,868,423.95 - Step 5: Solve for x
x = 4,467,868,423.95/81,128.18 - Step 6: Final answer
x = 55,071.72
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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.