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Finding the Fourth Proportional to 159,890.40, 239,720.40 and 89,791.20

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Solution

The fourth proportional to 159,890.40, 239,720.40 and 89,791.20 is: 134,622.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,890.40 : 239,720.40 = 89,791.20 : x
  2. Step 2: Convert to fraction form
    159,890.40/239,720.40 = 89,791.20/x
  3. Step 3: Cross multiply
    159,890.40x = 239,720.40 × 89,791.20
  4. Step 4: Simplify right side
    159,890.40x = 21,524,782,380.48
  5. Step 5: Solve for x
    x = 21,524,782,380.48/159,890.40
  6. Step 6: Final answer
    x = 134,622.11

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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.