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Finding the Fourth Proportional to 81,698.78, 122,564.56 and 37,313.60

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Solution

The fourth proportional to 81,698.78, 122,564.56 and 37,313.60 is: 55,977.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,698.78 : 122,564.56 = 37,313.60 : x
  2. Step 2: Convert to fraction form
    81,698.78/122,564.56 = 37,313.60/x
  3. Step 3: Cross multiply
    81,698.78x = 122,564.56 × 37,313.60
  4. Step 4: Simplify right side
    81,698.78x = 4,573,324,966.02
  5. Step 5: Solve for x
    x = 4,573,324,966.02/81,698.78
  6. Step 6: Final answer
    x = 55,977.89

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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.