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Finding the Fourth Proportional to 220,356.72, 330,581.52 and 115,147.44

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Solution

The fourth proportional to 220,356.72, 330,581.52 and 115,147.44 is: 172,745.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,356.72 : 330,581.52 = 115,147.44 : x
  2. Step 2: Convert to fraction form
    220,356.72/330,581.52 = 115,147.44/x
  3. Step 3: Cross multiply
    220,356.72x = 330,581.52 × 115,147.44
  4. Step 4: Simplify right side
    220,356.72x = 38,065,615,739.31
  5. Step 5: Solve for x
    x = 38,065,615,739.31/220,356.72
  6. Step 6: Final answer
    x = 172,745.43

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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.