Home / 81,391.08-122,273.75-57,430.54

Finding the Fourth Proportional to 81,391.08, 122,273.75 and 57,430.54

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Solution

The fourth proportional to 81,391.08, 122,273.75 and 57,430.54 is: 86,277.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.08 : 122,273.75 = 57,430.54 : x
  2. Step 2: Convert to fraction form
    81,391.08/122,273.75 = 57,430.54/x
  3. Step 3: Cross multiply
    81,391.08x = 122,273.75 × 57,430.54
  4. Step 4: Simplify right side
    81,391.08x = 7,022,247,786.74
  5. Step 5: Solve for x
    x = 7,022,247,786.74/81,391.08
  6. Step 6: Final answer
    x = 86,277.85

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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.