Finding the Fourth Proportional to 207,908.88, 286,913.76 and 112,415.28
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Solution
The fourth proportional to 207,908.88, 286,913.76 and 112,415.28 is: 155,132.82
Step by Step Solution
- Step 1: Write the proportion equation
207,908.88 : 286,913.76 = 112,415.28 : x - Step 2: Convert to fraction form
207,908.88/286,913.76 = 112,415.28/x - Step 3: Cross multiply
207,908.88x = 286,913.76 × 112,415.28 - Step 4: Simplify right side
207,908.88x = 32,253,490,666.25 - Step 5: Solve for x
x = 32,253,490,666.25/207,908.88 - Step 6: Final answer
x = 155,132.82
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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.