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Finding the Fourth Proportional to 73,229.20, 109,843.80 and 28,831.75

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Solution

The fourth proportional to 73,229.20, 109,843.80 and 28,831.75 is: 43,247.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,229.20 : 109,843.80 = 28,831.75 : x
  2. Step 2: Convert to fraction form
    73,229.20/109,843.80 = 28,831.75/x
  3. Step 3: Cross multiply
    73,229.20x = 109,843.80 × 28,831.75
  4. Step 4: Simplify right side
    73,229.20x = 3,166,988,980.65
  5. Step 5: Solve for x
    x = 3,166,988,980.65/73,229.20
  6. Step 6: Final answer
    x = 43,247.63

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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.