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Finding the Fourth Proportional to 72,418.20, 108,627.44 and 30,865.20

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Solution

The fourth proportional to 72,418.20, 108,627.44 and 30,865.20 is: 46,297.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,418.20 : 108,627.44 = 30,865.20 : x
  2. Step 2: Convert to fraction form
    72,418.20/108,627.44 = 30,865.20/x
  3. Step 3: Cross multiply
    72,418.20x = 108,627.44 × 30,865.20
  4. Step 4: Simplify right side
    72,418.20x = 3,352,807,661.09
  5. Step 5: Solve for x
    x = 3,352,807,661.09/72,418.20
  6. Step 6: Final answer
    x = 46,297.86

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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.