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Finding the Fourth Proportional to 220,190.80, 330,415.80 and 79,963.60

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Solution

The fourth proportional to 220,190.80, 330,415.80 and 79,963.60 is: 119,992.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,190.80 : 330,415.80 = 79,963.60 : x
  2. Step 2: Convert to fraction form
    220,190.80/330,415.80 = 79,963.60/x
  3. Step 3: Cross multiply
    220,190.80x = 330,415.80 × 79,963.60
  4. Step 4: Simplify right side
    220,190.80x = 26,421,236,864.88
  5. Step 5: Solve for x
    x = 26,421,236,864.88/220,190.80
  6. Step 6: Final answer
    x = 119,992.47

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1.5x scale

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.