Finding the Fourth Proportional to 128,266.84, 177,008.16 and 71,678.08
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Solution
The fourth proportional to 128,266.84, 177,008.16 and 71,678.08 is: 98,915.71
Step by Step Solution
- Step 1: Write the proportion equation
128,266.84 : 177,008.16 = 71,678.08 : x - Step 2: Convert to fraction form
128,266.84/177,008.16 = 71,678.08/x - Step 3: Cross multiply
128,266.84x = 177,008.16 × 71,678.08 - Step 4: Simplify right side
128,266.84x = 12,687,605,053.13 - Step 5: Solve for x
x = 12,687,605,053.13/128,266.84 - Step 6: Final answer
x = 98,915.71
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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.