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Finding the Fourth Proportional to 86,796.40, 130,162.20 and 30,614.80

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Solution

The fourth proportional to 86,796.40, 130,162.20 and 30,614.80 is: 45,910.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,796.40 : 130,162.20 = 30,614.80 : x
  2. Step 2: Convert to fraction form
    86,796.40/130,162.20 = 30,614.80/x
  3. Step 3: Cross multiply
    86,796.40x = 130,162.20 × 30,614.80
  4. Step 4: Simplify right side
    86,796.40x = 3,984,889,720.56
  5. Step 5: Solve for x
    x = 3,984,889,720.56/86,796.40
  6. Step 6: Final answer
    x = 45,910.77

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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.