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Finding the Fourth Proportional to 220,623.40, 330,704.70 and 120,629.80

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Solution

The fourth proportional to 220,623.40, 330,704.70 and 120,629.80 is: 180,818.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,623.40 : 330,704.70 = 120,629.80 : x
  2. Step 2: Convert to fraction form
    220,623.40/330,704.70 = 120,629.80/x
  3. Step 3: Cross multiply
    220,623.40x = 330,704.70 × 120,629.80
  4. Step 4: Simplify right side
    220,623.40x = 39,892,841,820.06
  5. Step 5: Solve for x
    x = 39,892,841,820.06/220,623.40
  6. Step 6: Final answer
    x = 180,818.72

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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.