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Finding the Fourth Proportional to 220,665.80, 330,581.12 and 130,438.38

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Solution

The fourth proportional to 220,665.80, 330,581.12 and 130,438.38 is: 195,410.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,665.80 : 330,581.12 = 130,438.38 : x
  2. Step 2: Convert to fraction form
    220,665.80/330,581.12 = 130,438.38/x
  3. Step 3: Cross multiply
    220,665.80x = 330,581.12 × 130,438.38
  4. Step 4: Simplify right side
    220,665.80x = 43,120,466,338.87
  5. Step 5: Solve for x
    x = 43,120,466,338.87/220,665.80
  6. Step 6: Final answer
    x = 195,410.73

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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.