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Finding the Fourth Proportional to 115,903.44, 173,913.48 and 86,380.56

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Solution

The fourth proportional to 115,903.44, 173,913.48 and 86,380.56 is: 129,614.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,903.44 : 173,913.48 = 86,380.56 : x
  2. Step 2: Convert to fraction form
    115,903.44/173,913.48 = 86,380.56/x
  3. Step 3: Cross multiply
    115,903.44x = 173,913.48 × 86,380.56
  4. Step 4: Simplify right side
    115,903.44x = 15,022,743,793.95
  5. Step 5: Solve for x
    x = 15,022,743,793.95/115,903.44
  6. Step 6: Final answer
    x = 129,614.30

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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.