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Finding the Fourth Proportional to 220,216.40, 330,178.80 and 79,956.80

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Solution

The fourth proportional to 220,216.40, 330,178.80 and 79,956.80 is: 119,882.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,216.40 : 330,178.80 = 79,956.80 : x
  2. Step 2: Convert to fraction form
    220,216.40/330,178.80 = 79,956.80/x
  3. Step 3: Cross multiply
    220,216.40x = 330,178.80 × 79,956.80
  4. Step 4: Simplify right side
    220,216.40x = 26,400,040,275.84
  5. Step 5: Solve for x
    x = 26,400,040,275.84/220,216.40
  6. Step 6: Final answer
    x = 119,882.26

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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.