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Finding the Fourth Proportional to 220,393.80, 330,720.30 and 80,134.20

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Solution

The fourth proportional to 220,393.80, 330,720.30 and 80,134.20 is: 120,248.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,393.80 : 330,720.30 = 80,134.20 : x
  2. Step 2: Convert to fraction form
    220,393.80/330,720.30 = 80,134.20/x
  3. Step 3: Cross multiply
    220,393.80x = 330,720.30 × 80,134.20
  4. Step 4: Simplify right side
    220,393.80x = 26,502,006,664.26
  5. Step 5: Solve for x
    x = 26,502,006,664.26/220,393.80
  6. Step 6: Final answer
    x = 120,248.42

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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.