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Finding the Fourth Proportional to 86,231.88, 129,315.48 and 30,057.54

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Solution

The fourth proportional to 86,231.88, 129,315.48 and 30,057.54 is: 45,075.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,231.88 : 129,315.48 = 30,057.54 : x
  2. Step 2: Convert to fraction form
    86,231.88/129,315.48 = 30,057.54/x
  3. Step 3: Cross multiply
    86,231.88x = 129,315.48 × 30,057.54
  4. Step 4: Simplify right side
    86,231.88x = 3,886,905,212.72
  5. Step 5: Solve for x
    x = 3,886,905,212.72/86,231.88
  6. Step 6: Final answer
    x = 45,075.04

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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.