Finding the Fourth Proportional to 74,478.40, 102,779.04 and 40,943.68
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Solution
The fourth proportional to 74,478.40, 102,779.04 and 40,943.68 is: 56,501.65
Step by Step Solution
- Step 1: Write the proportion equation
74,478.40 : 102,779.04 = 40,943.68 : x - Step 2: Convert to fraction form
74,478.40/102,779.04 = 40,943.68/x - Step 3: Cross multiply
74,478.40x = 102,779.04 × 40,943.68 - Step 4: Simplify right side
74,478.40x = 4,208,152,124.47 - Step 5: Solve for x
x = 4,208,152,124.47/74,478.40 - Step 6: Final answer
x = 56,501.65
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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.