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Finding the Fourth Proportional to 220,614.70, 331,015.38 and 120,658.20

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Solution

The fourth proportional to 220,614.70, 331,015.38 and 120,658.20 is: 181,038.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,614.70 : 331,015.38 = 120,658.20 : x
  2. Step 2: Convert to fraction form
    220,614.70/331,015.38 = 120,658.20/x
  3. Step 3: Cross multiply
    220,614.70x = 331,015.38 × 120,658.20
  4. Step 4: Simplify right side
    220,614.70x = 39,939,719,923.12
  5. Step 5: Solve for x
    x = 39,939,719,923.12/220,614.70
  6. Step 6: Final answer
    x = 181,038.34

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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.