Finding the Fourth Proportional to 74,430.70, 102,714.86 and 40,439.18
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Solution
The fourth proportional to 74,430.70, 102,714.86 and 40,439.18 is: 55,806.34
Step by Step Solution
- Step 1: Write the proportion equation
74,430.70 : 102,714.86 = 40,439.18 : x - Step 2: Convert to fraction form
74,430.70/102,714.86 = 40,439.18/x - Step 3: Cross multiply
74,430.70x = 102,714.86 × 40,439.18 - Step 4: Simplify right side
74,430.70x = 4,153,704,712.21 - Step 5: Solve for x
x = 4,153,704,712.21/74,430.70 - Step 6: Final answer
x = 55,806.34
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1.5x scale
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.