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Finding the Fourth Proportional to 86,571.59, 129,868.36 and 27,385.88

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Solution

The fourth proportional to 86,571.59, 129,868.36 and 27,385.88 is: 41,082.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,571.59 : 129,868.36 = 27,385.88 : x
  2. Step 2: Convert to fraction form
    86,571.59/129,868.36 = 27,385.88/x
  3. Step 3: Cross multiply
    86,571.59x = 129,868.36 × 27,385.88
  4. Step 4: Simplify right side
    86,571.59x = 3,556,558,604.95
  5. Step 5: Solve for x
    x = 3,556,558,604.95/86,571.59
  6. Step 6: Final answer
    x = 41,082.29

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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.