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Finding the Fourth Proportional to 220,103.20, 330,057.60 and 86,939.20

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Solution

The fourth proportional to 220,103.20, 330,057.60 and 86,939.20 is: 130,370.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,103.20 : 330,057.60 = 86,939.20 : x
  2. Step 2: Convert to fraction form
    220,103.20/330,057.60 = 86,939.20/x
  3. Step 3: Cross multiply
    220,103.20x = 330,057.60 × 86,939.20
  4. Step 4: Simplify right side
    220,103.20x = 28,694,943,697.92
  5. Step 5: Solve for x
    x = 28,694,943,697.92/220,103.20
  6. Step 6: Final answer
    x = 130,370.41

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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.