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Finding the Fourth Proportional to 73,687.80, 110,439.24 and 31,518.39

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Solution

The fourth proportional to 73,687.80, 110,439.24 and 31,518.39 is: 47,238.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,687.80 : 110,439.24 = 31,518.39 : x
  2. Step 2: Convert to fraction form
    73,687.80/110,439.24 = 31,518.39/x
  3. Step 3: Cross multiply
    73,687.80x = 110,439.24 × 31,518.39
  4. Step 4: Simplify right side
    73,687.80x = 3,480,867,037.62
  5. Step 5: Solve for x
    x = 3,480,867,037.62/73,687.80
  6. Step 6: Final answer
    x = 47,238.04

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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.