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Finding the Fourth Proportional to 50,079.60, 75,129.48 and 18,489.87

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Solution

The fourth proportional to 50,079.60, 75,129.48 and 18,489.87 is: 27,738.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,079.60 : 75,129.48 = 18,489.87 : x
  2. Step 2: Convert to fraction form
    50,079.60/75,129.48 = 18,489.87/x
  3. Step 3: Cross multiply
    50,079.60x = 75,129.48 × 18,489.87
  4. Step 4: Simplify right side
    50,079.60x = 1,389,134,318.37
  5. Step 5: Solve for x
    x = 1,389,134,318.37/50,079.60
  6. Step 6: Final answer
    x = 27,738.53

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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.