Home / 99,984.78-137,982.68-54,665.78

Finding the Fourth Proportional to 99,984.78, 137,982.68 and 54,665.78

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Solution

The fourth proportional to 99,984.78, 137,982.68 and 54,665.78 is: 75,440.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,984.78 : 137,982.68 = 54,665.78 : x
  2. Step 2: Convert to fraction form
    99,984.78/137,982.68 = 54,665.78/x
  3. Step 3: Cross multiply
    99,984.78x = 137,982.68 × 54,665.78
  4. Step 4: Simplify right side
    99,984.78x = 7,542,930,828.69
  5. Step 5: Solve for x
    x = 7,542,930,828.69/99,984.78
  6. Step 6: Final answer
    x = 75,440.79

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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.