Finding the Fourth Proportional to 128,766.08, 177,699.35 and 71,407.82
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Solution
The fourth proportional to 128,766.08, 177,699.35 and 71,407.82 is: 98,543.98
Step by Step Solution
- Step 1: Write the proportion equation
128,766.08 : 177,699.35 = 71,407.82 : x - Step 2: Convert to fraction form
128,766.08/177,699.35 = 71,407.82/x - Step 3: Cross multiply
128,766.08x = 177,699.35 × 71,407.82 - Step 4: Simplify right side
128,766.08x = 12,689,121,953.38 - Step 5: Solve for x
x = 12,689,121,953.38/128,766.08 - Step 6: Final answer
x = 98,543.98
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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.