Finding the Fourth Proportional to 81,178.05, 121,786.28 and 25,774.05
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Solution
The fourth proportional to 81,178.05, 121,786.28 and 25,774.05 is: 38,667.17
Step by Step Solution
- Step 1: Write the proportion equation
81,178.05 : 121,786.28 = 25,774.05 : x - Step 2: Convert to fraction form
81,178.05/121,786.28 = 25,774.05/x - Step 3: Cross multiply
81,178.05x = 121,786.28 × 25,774.05 - Step 4: Simplify right side
81,178.05x = 3,138,925,541.16 - Step 5: Solve for x
x = 3,138,925,541.16/81,178.05 - Step 6: Final answer
x = 38,667.17
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.