Finding the Fourth Proportional to 74,421.40, 102,702.25 and 40,430.15
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Solution
The fourth proportional to 74,421.40, 102,702.25 and 40,430.15 is: 55,793.99
Step by Step Solution
- Step 1: Write the proportion equation
74,421.40 : 102,702.25 = 40,430.15 : x - Step 2: Convert to fraction form
74,421.40/102,702.25 = 40,430.15/x - Step 3: Cross multiply
74,421.40x = 102,702.25 × 40,430.15 - Step 4: Simplify right side
74,421.40x = 4,152,266,657.18 - Step 5: Solve for x
x = 4,152,266,657.18/74,421.40 - Step 6: Final answer
x = 55,793.99
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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.