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Finding the Fourth Proportional to 220,987.80, 331,481.70 and 54,775.80

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Solution

The fourth proportional to 220,987.80, 331,481.70 and 54,775.80 is: 82,163.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,987.80 : 331,481.70 = 54,775.80 : x
  2. Step 2: Convert to fraction form
    220,987.80/331,481.70 = 54,775.80/x
  3. Step 3: Cross multiply
    220,987.80x = 331,481.70 × 54,775.80
  4. Step 4: Simplify right side
    220,987.80x = 18,157,175,302.86
  5. Step 5: Solve for x
    x = 18,157,175,302.86/220,987.80
  6. Step 6: Final answer
    x = 82,163.70

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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.