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Finding the Fourth Proportional to 75,439.79, 112,997.69 and 71,023.41

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Solution

The fourth proportional to 75,439.79, 112,997.69 and 71,023.41 is: 106,382.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,439.79 : 112,997.69 = 71,023.41 : x
  2. Step 2: Convert to fraction form
    75,439.79/112,997.69 = 71,023.41/x
  3. Step 3: Cross multiply
    75,439.79x = 112,997.69 × 71,023.41
  4. Step 4: Simplify right side
    75,439.79x = 8,025,480,910.81
  5. Step 5: Solve for x
    x = 8,025,480,910.81/75,439.79
  6. Step 6: Final answer
    x = 106,382.61

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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.