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Finding the Fourth Proportional to 153,940.21, 212,584.22 and 145,553.52

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Solution

The fourth proportional to 153,940.21, 212,584.22 and 145,553.52 is: 201,002.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,940.21 : 212,584.22 = 145,553.52 : x
  2. Step 2: Convert to fraction form
    153,940.21/212,584.22 = 145,553.52/x
  3. Step 3: Cross multiply
    153,940.21x = 212,584.22 × 145,553.52
  4. Step 4: Simplify right side
    153,940.21x = 30,942,380,391.09
  5. Step 5: Solve for x
    x = 30,942,380,391.09/153,940.21
  6. Step 6: Final answer
    x = 201,002.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.