Finding the Fourth Proportional to 128,779.08, 177,678.90 and 101,470.47
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Solution
The fourth proportional to 128,779.08, 177,678.90 and 101,470.47 is: 140,000.70
Step by Step Solution
- Step 1: Write the proportion equation
128,779.08 : 177,678.90 = 101,470.47 : x - Step 2: Convert to fraction form
128,779.08/177,678.90 = 101,470.47/x - Step 3: Cross multiply
128,779.08x = 177,678.90 × 101,470.47 - Step 4: Simplify right side
128,779.08x = 18,029,161,492.08 - Step 5: Solve for x
x = 18,029,161,492.08/128,779.08 - Step 6: Final answer
x = 140,000.70
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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.