Finding the Fourth Proportional to 74,432.40, 102,715.56 and 40,897.68
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Solution
The fourth proportional to 74,432.40, 102,715.56 and 40,897.68 is: 56,438.17
Step by Step Solution
- Step 1: Write the proportion equation
74,432.40 : 102,715.56 = 40,897.68 : x - Step 2: Convert to fraction form
74,432.40/102,715.56 = 40,897.68/x - Step 3: Cross multiply
74,432.40x = 102,715.56 × 40,897.68 - Step 4: Simplify right side
74,432.40x = 4,200,828,103.90 - Step 5: Solve for x
x = 4,200,828,103.90/74,432.40 - Step 6: Final answer
x = 56,438.17
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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.