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Finding the Fourth Proportional to 73,399.20, 110,077.20 and 20,813.28

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Solution

The fourth proportional to 73,399.20, 110,077.20 and 20,813.28 is: 31,213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,399.20 : 110,077.20 = 20,813.28 : x
  2. Step 2: Convert to fraction form
    73,399.20/110,077.20 = 20,813.28/x
  3. Step 3: Cross multiply
    73,399.20x = 110,077.20 × 20,813.28
  4. Step 4: Simplify right side
    73,399.20x = 2,291,067,585.22
  5. Step 5: Solve for x
    x = 2,291,067,585.22/73,399.20
  6. Step 6: Final answer
    x = 31,213.80

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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.