Home / 81,961.54-122,945.38-28,643.09

Finding the Fourth Proportional to 81,961.54, 122,945.38 and 28,643.09

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Solution

The fourth proportional to 81,961.54, 122,945.38 and 28,643.09 is: 42,965.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,961.54 : 122,945.38 = 28,643.09 : x
  2. Step 2: Convert to fraction form
    81,961.54/122,945.38 = 28,643.09/x
  3. Step 3: Cross multiply
    81,961.54x = 122,945.38 × 28,643.09
  4. Step 4: Simplify right side
    81,961.54x = 3,521,534,898.09
  5. Step 5: Solve for x
    x = 3,521,534,898.09/81,961.54
  6. Step 6: Final answer
    x = 42,965.70

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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.