Finding the Fourth Proportional to 98,939.21, 147,865.68 and 72,341.19
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Solution
The fourth proportional to 98,939.21, 147,865.68 and 72,341.19 is: 108,114.67
Step by Step Solution
- Step 1: Write the proportion equation
98,939.21 : 147,865.68 = 72,341.19 : x - Step 2: Convert to fraction form
98,939.21/147,865.68 = 72,341.19/x - Step 3: Cross multiply
98,939.21x = 147,865.68 × 72,341.19 - Step 4: Simplify right side
98,939.21x = 10,696,779,251.36 - Step 5: Solve for x
x = 10,696,779,251.36/98,939.21 - Step 6: Final answer
x = 108,114.67
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.