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Finding the Fourth Proportional to 73,999.20, 111,013.20 and 31,879.20

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Solution

The fourth proportional to 73,999.20, 111,013.20 and 31,879.20 is: 47,825.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,999.20 : 111,013.20 = 31,879.20 : x
  2. Step 2: Convert to fraction form
    73,999.20/111,013.20 = 31,879.20/x
  3. Step 3: Cross multiply
    73,999.20x = 111,013.20 × 31,879.20
  4. Step 4: Simplify right side
    73,999.20x = 3,539,012,005.44
  5. Step 5: Solve for x
    x = 3,539,012,005.44/73,999.20
  6. Step 6: Final answer
    x = 47,825.00

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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.